Re: adding new function
En Tue, 22 Jun 2010 14:18:59 -0300, Terry Reedy escribió: On 6/22/2010 5:44 AM, Daniel Fetchinson wrote: how can i simply add new functions to module after its initialization (Py_InitModule())? I'm missing something like PyModule_AddCFunction(). in Python, for modules written in python import mymod mymod.fname = somefunc #or setattr(mymod, namestring, funcobject) I presume you use the C-API equivalent of setattr. That one, or PyModule_AddObject (just for nicer error messages really). -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Book review / advise
On 6/22/10 9:45 PM, John Bokma wrote: > Stephen Hansen writes: > >> I *have* seen people burned by confusion over situations *extremely* >> similar to this; > > But is it? You didn't even ask yourself that question. Yes. I did. I don't really make a point of publishing internal dialog on mailing lists for you to determine though, so I can see the confusion. >> If being concerned about fellow Python-folks possibly getting ripped off >> makes me an asshat, so be it. Go y'know-what yourself. > > If this publisher is legimate you might very well be denying > people -- like I said I am interested -- from getting a print-out in the > future just because /you/ cried wolf and called them scammers. Uh, yeah. Okay. The level of utter absurdity in that statement is off the charts. I am not off starting some great interweb campaign to bring them down. I'm not logging into Amazon and down-rating all the books and giving them scathing reviews. I haven't notified any agencies (from Amazon, to the PSF) who may be interested in the scam (if it is a scam) to try to get action done. I haven't even considered registering sohobooksisascam.com to try to get the word out. Not that having an anti-website is any good when there's no website to go all anti against, but whatever. On a mailing list, a guy with no real influence or and absolutely no importance, questioned the validity of the publisher and the legitimacy and ethical behavior they're doing. If they can't stand up to one question-- they aren't legitimate. I "deny" nothing to anyone by raising a concern. If the concern is unfounded, great. If it isn't, then some people will be saved some grief. -- Stephen Hansen ... Also: Ixokai ... Mail: me+list/python (AT) ixokai (DOT) io ... Blog: http://meh.ixokai.io/ signature.asc Description: OpenPGP digital signature -- http://mail.python.org/mailman/listinfo/python-list
Re: encodings.idna.ToASCII( unicodeStr ) != unicodeStr.encode( 'idna' )
En Tue, 22 Jun 2010 11:02:58 -0300, escribió:
Python 2.6.4 (Win32): Anyone have any explanation for the
following
encodings.idna.ToASCII( unicodeStr ) != unicodeStr.encode( 'idna'
)
Given that other processes may have to use the output of these
methods, what is the recommended technique?
Demonstration:
import encodings.idna
name = u'junk\xfc\xfd.txt'
name
u'junk\xfc\xfd.txt'
encodings.idna.ToASCII( name )
'xn--junk.txt-95ak'
name.encode( 'idna' )
'xn--junk-3rag.txt'
encodings.idna.ToUnicode( encodings.idna.ToASCII( name ) )
u'junk\xfc\xfd.txt'
name.encode( 'idna' ).decode( 'idna' )
u'junk\xfc\xfd.txt'
IDNA is *specifically* designed to operate with domain names, not
arbitrary text. (IDNA = Internationalizing Domain Names in Applications).
Even the encoding/decoding part alone(punycode) is specifically tailored
for use in domain names. Do not use it for any other purpose.
That said, it seems that encodings.idna.ToUnicode/ToAscii work on
individual 'labels' only (a domain name is comprised of several labels
separated by '.') -- and encode/decode('idna') takes the whole name,
splits, and processes each label (following RFC 3490, I presume)
--
Gabriel Genellina
--
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Re: adding new function
Am 22.06.2010 19:18, schrieb Terry Reedy: > On 6/22/2010 5:44 AM, Daniel Fetchinson wrote: >>> how can i simply add new functions to module after its initialization >>> (Py_InitModule())? I'm missing something like >>> PyModule_AddCFunction(). > > in Python, for modules written in python > > import mymod > mymod.fname = somefunc #or > setattr(mymod, namestring, funcobject) For C code, it's a more complex. You have to construct a proper C function PyObject* from a PyMethodDef* first. See Python/modsupport.c:Py_InitModule4(). Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: Should I Learn Python or Ruby next?
rantingrick wrote: --- On Jun 22, 4:29 am, Jean-Michel Pichavant wrote: This is a python list, fully dedicated to our dutch semi God. So how can you even immagine that someone here will suggest you to go for rub... sorry I can't prononce this blasphemous name. --- ...After reading these comments i reminisce back to a time when a good friend of this community "r" said basically the same things but was lynched for them. That's because "r" is the first letter of Ruby, try "p" and everybody will love you (that makes me think that Perl should be renamed as it outrageously share the same 1st character with Python). JM PS : I have no idea about Ruby, never used it, so I still don't understand why you quote me in your anti-ruby post -- http://mail.python.org/mailman/listinfo/python-list
Re: "isinstance" question
On 06/23/2010 08:39 AM, Satish Eerpini wrote: > > > I want to test whether an object is an instance of any > user-defined > class. "isinstance" is less helpful than one would expect. > > >>> import types > >>> class foo() : # define dummy class > ... pass > ... > >>> x = foo() > >>> > >>> type(x) > > >>> > >>> isinstance(x, types.ClassType) > False > >>> isinstance(x, types.InstanceType) > True > >>> foo > > >>> x > <__main__.foo instance at 0x020080A8> > > So far, so good. x is an InstanceType. But let's try a > class with a constructor: > > >>> class bar(object) : > ...def __init__(self, val) : > ... self.val = val > ... > >>> b = bar(100) > >>> b > <__main__.bar object at 0x01FF50D0> > >>> isinstance(b, types.InstanceType) > False > >>> isinstance(b, types.ClassType) > False > >> bar > > > well the same code on my side returns true when you run isinstance(b, > types.InstanceType) even when the class has a constructor. Why is there > a difference in the output when we are both using Cython 2.6 ?? (2.6.4 > to be exact) I assume you mean CPython, not Cython. As Gabriel said, the difference is that bar is a subclass of object. If isinstance(bar(100), types.InstanceType), then you did not subclass object, and get an old-style class. -- http://mail.python.org/mailman/listinfo/python-list
example of multi threads
I am looking for a simple multi threaded example. Lets say I have to ssh to 20 servers and I would like to that in parallel. Can someone please provide a an example for that? thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Should I Learn Python or Ruby next?
Ruby is a nice language to learn, but I seem to find it less matured. That might be my own personal perception. But looking at its success which you can read on Pythonology, I think it is going to be my choice and of many others for a long time to come. Besides ruby is more popular due to the rails attached to it. Happy hacking. Krishnakant. On Wednesday 23 June 2010 02:10 PM, Jean-Michel Pichavant wrote: rantingrick wrote: --- On Jun 22, 4:29 am, Jean-Michel Pichavant wrote: This is a python list, fully dedicated to our dutch semi God. So how can you even immagine that someone here will suggest you to go for rub... sorry I can't prononce this blasphemous name. --- ...After reading these comments i reminisce back to a time when a good friend of this community "r" said basically the same things but was lynched for them. That's because "r" is the first letter of Ruby, try "p" and everybody will love you (that makes me think that Perl should be renamed as it outrageously share the same 1st character with Python). JM PS : I have no idea about Ruby, never used it, so I still don't understand why you quote me in your anti-ruby post -- http://mail.python.org/mailman/listinfo/python-list
Re: example of multi threads
Mag Gam, 23.06.2010 12:24: I am looking for a simple multi threaded example. Lets say I have to ssh to 20 servers and I would like to that in parallel. Can someone please provide a an example for that? Sounds like you want to run background processes, not threads. Take a look at the subprocess module. Stefan -- http://mail.python.org/mailman/listinfo/python-list
Instance method decorator garbage collection problem
Hi, I've written a decorator that prints exceptions and I'm having some trouble with garbage collection. My decorator is: import sys def print_exception_decorator(fn): def decorator(self, *args, **kwds): try: return fn(*args, **kwds) except: print 'Exception:', sys.exc_info() raise return decorator The class I want to decorate the methods of is: class InstanceCounted(object): "A class that keeps track of how many instances there are." count = 0 def __init__(self): InstanceCounted.count += 1 def __del__(self): InstanceCounted.count -= 1 class A(InstanceCounted): "A class that I want to decorate a method on." def __init__(self): super(A, self).__init__() self.method = print_exception_decorator(self.method) def __del__(self): del self.method def method(self): pass When I run the following it does not seem like my object 'a' is garbage collected: print 'Have %d instances' % InstanceCounted.count print 'Creating A' a = A() print 'Have %d instances' % InstanceCounted.count print 'Deleting A' del a print 'Have %d instances' % InstanceCounted.count This is the output: Have 0 instances Creating A Have 1 instances Deleting A Have 1 instances The InstanceCounted.count is 1 at the end. If I omit the call to "self.method = print_exception_decorator(self.method)" then the instance count goes down to 0 as desired. I thought that the decorator might be holding a reference to the instance through the bound method, so I added the __del__() but it doesn't fix the problem. Can anyone suggest anything? Is my technique to decorate bound methods not a good one? How else should I decorate a bound method? Thanks in advance, John. -- http://mail.python.org/mailman/listinfo/python-list
Re: Instance method decorator garbage collection problem
On 06/23/2010 01:40 PM, John Reid wrote: > Hi, > > I've written a decorator that prints exceptions and I'm having some > trouble with garbage collection. > > My decorator is: > > import sys > def print_exception_decorator(fn): > def decorator(self, *args, **kwds): > try: > return fn(*args, **kwds) > except: > print 'Exception:', sys.exc_info() > raise > return decorator > > > > The class I want to decorate the methods of is: > > class InstanceCounted(object): > "A class that keeps track of how many instances there are." > count = 0 > def __init__(self): > InstanceCounted.count += 1 > def __del__(self): > InstanceCounted.count -= 1 > > class A(InstanceCounted): > "A class that I want to decorate a method on." > def __init__(self): > super(A, self).__init__() > self.method = print_exception_decorator(self.method) > > def __del__(self): > del self.method > > def method(self): > pass > > > > When I run the following it does not seem like my object 'a' is garbage > collected: > > print 'Have %d instances' % InstanceCounted.count > print 'Creating A' > a = A() > print 'Have %d instances' % InstanceCounted.count > print 'Deleting A' > del a > print 'Have %d instances' % InstanceCounted.count > > > This is the output: > > Have 0 instances > Creating A > Have 1 instances > Deleting A > Have 1 instances > > > The InstanceCounted.count is 1 at the end. If I omit the call to > "self.method = print_exception_decorator(self.method)" then the instance > count goes down to 0 as desired. I thought that the decorator might be > holding a reference to the instance through the bound method, so I added > the __del__() but it doesn't fix the problem. Adding __del__ like this does "fix the problem", but it introduces a new one: lacking a call to super().__del__, you simply don't decrement the instance count. To decorate a method, you'd best just decorate it normally. I doubt your technique will work anyway, as the function returned by the decorator isn't bound to the object, you'd need to pass one self reference implicitly, which is then thrown away. simply, def exc_decor(fn): @functools.wraps(fn) def wrapper(*args, **keywords): try: return fn(*args, **keywords): except: #... raise return wrapper class X(...): @exc_decor def foo(self, arg): pass (if targeting pre-decorator Python, the code would look different of course) This way, the function itself is decorated, and the function returned by the decorator is bound to the object. It'll just work as expected, no trickery required. -- Thomas > > Can anyone suggest anything? Is my technique to decorate bound methods > not a good one? How else should I decorate a bound method? > > Thanks in advance, > John. > > -- http://mail.python.org/mailman/listinfo/python-list
Re: Instance method decorator garbage collection problem
John Reid wrote: > Hi, > > I've written a decorator that prints exceptions and I'm having some > trouble with garbage collection. > > My decorator is: > > import sys > def print_exception_decorator(fn): > def decorator(self, *args, **kwds): > try: > return fn(*args, **kwds) > except: > print 'Exception:', sys.exc_info() > raise > return decorator > > > > The class I want to decorate the methods of is: > > class InstanceCounted(object): > "A class that keeps track of how many instances there are." > count = 0 > def __init__(self): > InstanceCounted.count += 1 > def __del__(self): > InstanceCounted.count -= 1 > > class A(InstanceCounted): > "A class that I want to decorate a method on." > def __init__(self): > super(A, self).__init__() > self.method = print_exception_decorator(self.method) > > def __del__(self): > del self.method > > def method(self): > pass > > > > When I run the following it does not seem like my object 'a' is garbage > collected: > > print 'Have %d instances' % InstanceCounted.count > print 'Creating A' > a = A() > print 'Have %d instances' % InstanceCounted.count > print 'Deleting A' > del a > print 'Have %d instances' % InstanceCounted.count > > > This is the output: > > Have 0 instances > Creating A > Have 1 instances > Deleting A > Have 1 instances > > > The InstanceCounted.count is 1 at the end. If I omit the call to > "self.method = print_exception_decorator(self.method)" then the instance > count goes down to 0 as desired. I thought that the decorator might be > holding a reference to the instance through the bound method, so I added > the __del__() but it doesn't fix the problem. > > Can anyone suggest anything? Is my technique to decorate bound methods > not a good one? How else should I decorate a bound method? The problem is that cyclic garbage collection cannot cope with __del__() methods. Quoting http://docs.python.org/library/gc.html#gc.garbage """ Objects that have __del__() methods and are part of a reference cycle cause the entire reference cycle to be uncollectable """ The best workaround is to control the object's lifetime explicitly by turning it into a context manager, see http://docs.python.org/reference/datamodel.html#with-statement-context- managers or providing a close() method and use contextlib: >>> class A(object): ... def close(self): ... print "break cycles here" ... >>> class A(object): ... def __init__(self): ... self.self = self ... def __del__(self): ... print "bye" ... def close(self): ... print "breaking cycles here" ... del self.self ... >>> a = A() >>> del a >>> import contextlib >>> with contextlib.closing(A()) as b: ... print "using b" ... using b breaking cycles here >>> del b bye Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Instance method decorator garbage collection problem
> The InstanceCounted.count is 1 at the end. If I omit the call to > "self.method = print_exception_decorator(self.method)" then the instance > count goes down to 0 as desired. I thought that the decorator might be > holding a reference to the instance through the bound method, so I added > the __del__() but it doesn't fix the problem. Adding __del__ introduces a whole bunch of new issues with cyclic gc. http://docs.python.org/library/gc.html#gc.garbage > Can anyone suggest anything? Is my technique to decorate bound methods > not a good one? How else should I decorate a bound method? You shouldn't use __del__ to count your instances. Instead you can use sys.getrefcount() and gc.get_objects() or use a weakref with a callback. Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: Instance method decorator garbage collection problem
Thomas Jollans wrote: The InstanceCounted.count is 1 at the end. If I omit the call to "self.method = print_exception_decorator(self.method)" then the instance count goes down to 0 as desired. I thought that the decorator might be holding a reference to the instance through the bound method, so I added the __del__() but it doesn't fix the problem. Adding __del__ like this does "fix the problem", but it introduces a new one: lacking a call to super().__del__, you simply don't decrement the instance count. Now that's a good point! I've added super().__del__ but the problem remains for some reason. My A class now looks like: class A(InstanceCounted): "A class that I want to decorate a method on." def __init__(self): super(A, self).__init__() self.method = print_exception_decorator(self.method) def __del__(self): super(A, self).__del__() del self.method def method(self): pass Did you try this? To decorate a method, you'd best just decorate it normally. I doubt your technique will work anyway, as the function returned by the decorator isn't bound to the object, you'd need to pass one self reference implicitly, which is then thrown away. Looking at the original post, I had included an extra "self" in the argument list def decorator(self, *args, **kwds): should have been def decorator(*args, **kwds): With this correction my method decorates instance methods on objects successfully although I don't know why the garbage collection isn't working. simply, def exc_decor(fn): @functools.wraps(fn) def wrapper(*args, **keywords): try: return fn(*args, **keywords): except: #... raise return wrapper class X(...): @exc_decor def foo(self, arg): pass (if targeting pre-decorator Python, the code would look different of course) This way, the function itself is decorated, and the function returned by the decorator is bound to the object. It'll just work as expected, no trickery required. Thanks for this. I remember having some problems decorating instance methods in the past which is why I started doing it as in the original post. Your method seems just fine though. Thanks, John. -- http://mail.python.org/mailman/listinfo/python-list
Re: Should I Learn Python or Ruby next?
--- On Wed, 6/23/10, Stephen Hansen wrote: > From: Stephen Hansen > Subject: Re: Should I Learn Python or Ruby next? > To: python-list@python.org > Date: Wednesday, June 23, 2010, 1:51 AM > On 6/22/10 10:39 PM, Dennis Lee > Bieber wrote: > > On Tue, 22 Jun 2010 15:55:51 -0700, Stephen Hansen > > > declaimed the following in > > gmane.comp.python.general: > > > >> I second Forth. Learning and using that was -- > slightly painful, but > > > > Just pick up any advanced HP > programmable calculator... RPL is a > > close substitute > > That's just a start. The reverse and stack-oriented nature > of the > language makes you have to start thinking in an interesting > way, and > sure, a RPL/stack-calculator can get that for you. > > But then going on and doing real programming with it, > making your own > words (functions), ... its fun. > > -- > > Stephen Hansen > ... Also: Ixokai > ... Mail: me+list/python (AT) ixokai > (DOT) io > ... Blog: http://meh.ixokai.io/ > > > -Inline Attachment Follows- > > -- > http://mail.python.org/mailman/listinfo/python-list > I agree you should learn a DIFFERENT programming language. Perl, Python, & Ruby are all quite similar. If you want to expand your horizons, learn one of the following: Forth -lots of fun. Assembler - give you a much better understanding of what is really happening under the hood. Prolog - a very different way of thinking. Give one of them a try. -EdK Ed Keith e_...@yahoo.com Blog: edkeith.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Should I Learn Python or Ruby next?
--- On Wed, 6/23/10, Dennis Lee Bieber wrote: > From: Dennis Lee Bieber > Subject: Re: Should I Learn Python or Ruby next? > To: python-list@python.org > Date: Wednesday, June 23, 2010, 1:39 AM > On Tue, 22 Jun 2010 15:55:51 -0700, > Stephen Hansen > > declaimed the following in > gmane.comp.python.general: > > > I second Forth. Learning and using that was -- > slightly painful, but > > Just pick up any advanced HP > programmable calculator... RPL is a > close substitute > > > really invigorating. And I also second learning a > functional language > > (though I don't know if I'd inflict Haskell on > anyone). > > > > Is APL still available? > 4 5 $rho 20 ? 52 > (using a common means for lack of greek keyboard) > -- > Wulfraed > Dennis Lee > Bieber AF6VN > wlfr...@ix.netcom.com > HTTP://wlfraed.home.netcom.com/ > > -- > http://mail.python.org/mailman/listinfo/python-list > Try J. It does not require a special keyboard. -EdK Ed Keith e_...@yahoo.com Blog: edkeith.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Another MySQL Problem
Hi;
I have this line:
cursor.execute('select clientEmail from clients where client=%s',
(string.replace(client, '_', ' ')))
clientEmail = cursor.fetchone()[0]
cursor.execute('select * from %s' % (client))
client = "Lincoln_Properties"
With the replacement, the interpreter complains that mydatabase.Lincoln
doesn't exist. Therefore, the first line of code isn't putting the %s
replacement in quotes, as I was told by you all it would. So I add quotes to
it and the interpreter complains on the second line of code that it's
unsubscriptable (because it's None). What gives?
TIA
beno
--
http://mail.python.org/mailman/listinfo/python-list
Re: Should I Learn Python or Ruby next?
Stephen Hansen wrote: On 6/22/10 10:39 PM, Dennis Lee Bieber wrote: On Tue, 22 Jun 2010 15:55:51 -0700, Stephen Hansen declaimed the following in gmane.comp.python.general: I second Forth. Learning and using that was -- slightly painful, but Just pick up any advanced HP programmable calculator... RPL is a close substitute That's just a start. The reverse and stack-oriented nature of the language makes you have to start thinking in an interesting way, and sure, a RPL/stack-calculator can get that for you. But then going on and doing real programming with it, making your own words (functions), ... its fun. And two places where it differs from nearly every other language: when you define your own flow-control enhancements to the language (e.g. WHILE is not a keyword, it's merely a function), and when you finally understand dodoes (that's "Do Does"). DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: Another MySQL Problem
On 6/23/10 6:45 AM, Victor Subervi wrote:
> Hi;
> I have this line:
>
> cursor.execute('select clientEmail from clients where client=%s',
> (string.replace(client, '_', ' ')))
> clientEmail = cursor.fetchone()[0]
> cursor.execute('select * from %s' % (client))
>
> client = "Lincoln_Properties"
> With the replacement, the interpreter complains that mydatabase.Lincoln
> doesn't exist. Therefore, the first line of code isn't putting the %s
> replacement in quotes, as I was told by you all it would. So I add
> quotes to it and the interpreter complains on the second line of code
> that it's unsubscriptable (because it's None). What gives?
Its very early, so excuse me if I fall asleep in the middle of the response.
First: Don't do 'string.replace(your_string, x, y)' -- that's back in
the very, very old days before strings themselves had all the nice methods.
Do, 'client.replace("_", " ")' instead.
Second, you're forgetting a cardinal rule. Always, always, always,
include the actual tracebacks when reporting errors. Don't summarize them.
Third, I *think* the problem is-- though I may be wrong here, because
again, just woke up-- that you're not passing the options as a tuple.
Consider: ("hello") is not a tuple with one item. This is a slight
'wart' with Python syntax. Parens do not make tuples: *commas* do.
Therefore, every tuple *must* have a comma. To make a one-item tuple,
you must do ("hello", )
--
Stephen Hansen
... Also: Ixokai
... Mail: me+list/python (AT) ixokai (DOT) io
... Blog: http://meh.ixokai.io/
signature.asc
Description: OpenPGP digital signature
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Parsing email
Hi guys,
I use these codes to read emails from an IMAP server:
import imaplib
imap_srv_addr = "someserver"
imap_srv = imaplib.IMAP4_SSL(imap_srv_addr)
imap_srv.login("username","passwd")
imap_srv.select("Inbox")
msg = imap_srv.fetch(1, '(RFC822)')
How can I parse msg so it can be appended to the other IMAP server?
Best regards,
Xianwen
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Re: Another MySQL Problem
On Wed, Jun 23, 2010 at 10:25 AM, Stephen Hansen
wrote:
> On 6/23/10 6:45 AM, Victor Subervi wrote:
> > Hi;
> > I have this line:
> >
> > cursor.execute('select clientEmail from clients where client=%s',
> > (string.replace(client, '_', ' ')))
> > clientEmail = cursor.fetchone()[0]
> > cursor.execute('select * from %s' % (client))
> >
> > client = "Lincoln_Properties"
> > With the replacement, the interpreter complains that mydatabase.Lincoln
> > doesn't exist. Therefore, the first line of code isn't putting the %s
> > replacement in quotes, as I was told by you all it would. So I add
> > quotes to it and the interpreter complains on the second line of code
> > that it's unsubscriptable (because it's None). What gives?
>
> Its very early, so excuse me if I fall asleep in the middle of the
> response.
>
> First: Don't do 'string.replace(your_string, x, y)' -- that's back in
> the very, very old days before strings themselves had all the nice methods.
>
> Do, 'client.replace("_", " ")' instead.
>
> Second, you're forgetting a cardinal rule. Always, always, always,
> include the actual tracebacks when reporting errors. Don't summarize them.
>
> Third, I *think* the problem is-- though I may be wrong here, because
> again, just woke up-- that you're not passing the options as a tuple.
>
> Consider: ("hello") is not a tuple with one item. This is a slight
> 'wart' with Python syntax. Parens do not make tuples: *commas* do.
> Therefore, every tuple *must* have a comma. To make a one-item tuple,
> you must do ("hello", )
>
Well making the changes you suggest throws this error:
A problem occurred in a Python script. Here is the sequence of function
calls leading up to the error, in the order they occurred.
/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py
67
68 '''
69
70 mailSpreadsheet()
71
mailSpreadsheet =
/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py in
mailSpreadsheet()
34 subject = 'Order From Client'
35 cursor.execute('select clientEmail from clients where client="%s"',
(client.replace('_', ' '),))
36 clientEmail = cursor.fetchone()[0]
37 cursor.execute('select * from %s', (client,))
38 data = cursor.fetchall()
clientEmail = 'jp...@lpc.com', cursor = ,
cursor.fetchone = >
TypeError: unsubscriptable object
args = ('unsubscriptable object',)
Please advise.
TIA,
beno
--
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Re: Another MySQL Problem
On 6/23/10 8:16 AM, Victor Subervi wrote:
> On Wed, Jun 23, 2010 at 10:25 AM, Stephen Hansen
> mailto:pyt...@ixokai.io>> wrote:
>
> On 6/23/10 6:45 AM, Victor Subervi wrote:
> > Hi;
> > I have this line:
> >
> > cursor.execute('select clientEmail from clients where client=%s',
> > (string.replace(client, '_', ' ')))
> > clientEmail = cursor.fetchone()[0]
> > cursor.execute('select * from %s' % (client))
> >
> > client = "Lincoln_Properties"
> > With the replacement, the interpreter complains that
> mydatabase.Lincoln
> > doesn't exist. Therefore, the first line of code isn't putting the %s
> > replacement in quotes, as I was told by you all it would. So I add
> > quotes to it and the interpreter complains on the second line of code
> > that it's unsubscriptable (because it's None). What gives?
>
> Its very early, so excuse me if I fall asleep in the middle of the
> response.
>
> First: Don't do 'string.replace(your_string, x, y)' -- that's back in
> the very, very old days before strings themselves had all the nice
> methods.
>
> Do, 'client.replace("_", " ")' instead.
>
> Second, you're forgetting a cardinal rule. Always, always, always,
> include the actual tracebacks when reporting errors. Don't summarize
> them.
>
> Third, I *think* the problem is-- though I may be wrong here, because
> again, just woke up-- that you're not passing the options as a tuple.
>
> Consider: ("hello") is not a tuple with one item. This is a slight
> 'wart' with Python syntax. Parens do not make tuples: *commas* do.
> Therefore, every tuple *must* have a comma. To make a one-item tuple,
> you must do ("hello", )
>
>
> Well making the changes you suggest throws this error:
>
> A problem occurred in a Python script. Here is the sequence of function
> calls leading up to the error, in the order they occurred.
> /var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py
>
>67
>68 '''
>69
>70 mailSpreadsheet()
>71
> mailSpreadsheet =
> /var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py
> in mailSpreadsheet()
>34 subject = 'Order From Client'
>35 cursor.execute('select clientEmail from clients where
> client="%s"', (client.replace('_', ' '),))
>36 clientEmail = cursor.fetchone()[0]
>37 cursor.execute('select * from %s', (client,))
>38 data = cursor.fetchall()
> clientEmail = 'jp...@lpc.com ', cursor =
> , cursor.fetchone = Cursor.fetchone of >
>
> TypeError: unsubscriptable object
> args = ('unsubscriptable object',)
Generally speaking, though this may not be true for MySQL (I don't use
it as a rule), double quotes in SQL often have a special meaning that is
distinct from what you're used to in programming languages.
I.e., cur.execute('SELECT blah FROM blah WHERE blah = "hello"') is not
necessecarily the same as if you had spelled that last bit 'hello'. This
isn't universal across all SQL engines, but its something to keep in
mind. Basically: always use single quotes.
That said: you don't quote things when using parameterized statements.
You write, cur.execute("SELECT ... client = %s", ("my string",)) and not
"%s" in there. You did mention you switched this around at some point
earlier, but you had other problems then so there's no telling if those
other problems are what caused it not to work.
I'm assuming its line 36 which threw the error: cgitb includes some
lines after, so its non obvious when you're looking at it in plain text.
You should note the line number in such cases in case there's more then
one line nearby which looks possibly suspect.
--
Stephen Hansen
... Also: Ixokai
... Mail: me+list/python (AT) ixokai (DOT) io
... Blog: http://meh.ixokai.io/
signature.asc
Description: OpenPGP digital signature
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Re: Another MySQL Problem
On Wed, 23 Jun 2010 10:46:37 -0430, Victor Subervi
wrote:
> On Wed, Jun 23, 2010 at 10:25 AM, Stephen Hansen
> wrote:
>
>> On 6/23/10 6:45 AM, Victor Subervi wrote:
>> > Hi;
>> > I have this line:
>> >
>> > cursor.execute('select clientEmail from clients where client=%s',
>> > (string.replace(client, '_', ' ')))
>> > clientEmail = cursor.fetchone()[0]
>> > cursor.execute('select * from %s' % (client))
>> >
>> > client = "Lincoln_Properties"
>> > With the replacement, the interpreter complains that
mydatabase.Lincoln
>> > doesn't exist. Therefore, the first line of code isn't putting the %s
>> > replacement in quotes, as I was told by you all it would. So I add
>> > quotes to it and the interpreter complains on the second line of code
>> > that it's unsubscriptable (because it's None). What gives?
>>
>> Its very early, so excuse me if I fall asleep in the middle of the
>> response.
>>
>> First: Don't do 'string.replace(your_string, x, y)' -- that's back in
>> the very, very old days before strings themselves had all the nice
>> methods.
>>
>> Do, 'client.replace("_", " ")' instead.
>>
>> Second, you're forgetting a cardinal rule. Always, always, always,
>> include the actual tracebacks when reporting errors. Don't summarize
>> them.
>>
>> Third, I *think* the problem is-- though I may be wrong here, because
>> again, just woke up-- that you're not passing the options as a tuple.
>>
>> Consider: ("hello") is not a tuple with one item. This is a slight
>> 'wart' with Python syntax. Parens do not make tuples: *commas* do.
>> Therefore, every tuple *must* have a comma. To make a one-item tuple,
>> you must do ("hello", )
>>
>
> Well making the changes you suggest throws this error:
>
> A problem occurred in a Python script. Here is the sequence of function
> calls leading up to the error, in the order they occurred.
> /var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py
>67
>68 '''
>69
>70 mailSpreadsheet()
>71
> mailSpreadsheet =
> /var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py in
> mailSpreadsheet()
>34 subject = 'Order From Client'
>35 cursor.execute('select clientEmail from clients where
client="%s"',
> (client.replace('_', ' '),))
>36 clientEmail = cursor.fetchone()[0]
>37 cursor.execute('select * from %s', (client,))
>38 data = cursor.fetchall()
> clientEmail = 'jp...@lpc.com', cursor = ,
> cursor.fetchone = object>>
>
> TypeError: unsubscriptable object
> args = ('unsubscriptable object',)
>
> Please advise.
> TIA,
> beno
You should strongly consider reading the DB API 2.0 documentation :
http://www.python.org/dev/peps/pep-0249/
.fetchone()
Fetch the next row of a query result set, returning a
single sequence, or None when no more data is
available. [6]
You script fails because the request returns no results, and fetchone()
returns None.
Evaluating None[0] is invalid, so you get an exception.
Test fetchone() return value before accessing it as a sequence, and
everything should be OK :
row = cursor.fetchone()
if row is None:
# error handling, i.e.:
raise CustomException("Client not found")
clientEmail = row[0]
...
--
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Does a '_sre.SRE_Pattern' have state,or is it thread-safe?
'_sre.SRE_Pattern' is what "re.compile" returns. Is that a mutable object, with state that changes during the parse, or is it an immutable constant? Can two threads use the same '_sre.SRE_Pattern' at the same time? (I'm writing something to find race conditions in existing code, which is why all these obscure introspection-related questions.) John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Another MySQL Problem
Stephen Hansen writes:
>On 6/23/10 6:45 AM, Victor Subervi wrote:
>> cursor.execute('select clientEmail from clients where client=%s', ...
> Do, 'client.replace("_", " ")' instead.
Er, look what happened to Little Bobby Tables (a quick web search on his
name should find his story) because someone wrote code like that.
Really, write the code a different way, with a prepared query.
--
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Re: Another MySQL Problem
On Wed, 23 Jun 2010 10:46:37 -0430, Victor Subervi
wrote:
> On Wed, Jun 23, 2010 at 10:25 AM, Stephen Hansen
> wrote:
>
>> On 6/23/10 6:45 AM, Victor Subervi wrote:
>> > Hi;
>> > I have this line:
>> >
>> > cursor.execute('select clientEmail from clients where client=%s',
>> > (string.replace(client, '_', ' ')))
>> > clientEmail = cursor.fetchone()[0]
>> > cursor.execute('select * from %s' % (client))
>> >
>> > client = "Lincoln_Properties"
>> > With the replacement, the interpreter complains that
mydatabase.Lincoln
>> > doesn't exist. Therefore, the first line of code isn't putting the %s
>> > replacement in quotes, as I was told by you all it would. So I add
>> > quotes to it and the interpreter complains on the second line of code
>> > that it's unsubscriptable (because it's None). What gives?
>>
>> Its very early, so excuse me if I fall asleep in the middle of the
>> response.
>>
>> First: Don't do 'string.replace(your_string, x, y)' -- that's back in
>> the very, very old days before strings themselves had all the nice
>> methods.
>>
>> Do, 'client.replace("_", " ")' instead.
>>
>> Second, you're forgetting a cardinal rule. Always, always, always,
>> include the actual tracebacks when reporting errors. Don't summarize
>> them.
>>
>> Third, I *think* the problem is-- though I may be wrong here, because
>> again, just woke up-- that you're not passing the options as a tuple.
>>
>> Consider: ("hello") is not a tuple with one item. This is a slight
>> 'wart' with Python syntax. Parens do not make tuples: *commas* do.
>> Therefore, every tuple *must* have a comma. To make a one-item tuple,
>> you must do ("hello", )
>>
>
> Well making the changes you suggest throws this error:
>
> A problem occurred in a Python script. Here is the sequence of function
> calls leading up to the error, in the order they occurred.
> /var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py
>67
>68 '''
>69
>70 mailSpreadsheet()
>71
> mailSpreadsheet =
> /var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py in
> mailSpreadsheet()
>34 subject = 'Order From Client'
>35 cursor.execute('select clientEmail from clients where
client="%s"',
> (client.replace('_', ' '),))
>36 clientEmail = cursor.fetchone()[0]
>37 cursor.execute('select * from %s', (client,))
>38 data = cursor.fetchall()
> clientEmail = 'jp...@lpc.com', cursor = ,
> cursor.fetchone = object>>
>
> TypeError: unsubscriptable object
> args = ('unsubscriptable object',)
>
> Please advise.
> TIA,
> beno
You should strongly consider reading the DB API 2.0 documentation :
http://www.python.org/dev/peps/pep-0249/
.fetchone()
Fetch the next row of a query result set, returning a
single sequence, or None when no more data is
available. [6]
You script fails because the request returns no results, and fetchone()
returns None.
Evaluating None[0] is invalid, so you get an exception.
Test fetchone() return value before accessing it as a sequence, and
everything should be OK :
row = cursor.fetchone()
if row is None:
# error handling, i.e.:
raise CustomException("Client not found")
clientEmail = row[0]
...
--
http://mail.python.org/mailman/listinfo/python-list
Re: Another MySQL Problem
On 06/23/2010 08:45 AM, Victor Subervi wrote:
Hi;
I have this line:
cursor.execute('select clientEmail from clients where client=%s',
(string.replace(client, '_', ' ')))
clientEmail = cursor.fetchone()[0]
cursor.execute('select * from %s' % (client))
client = "Lincoln_Properties"
With the replacement, the interpreter complains that mydatabase.Lincoln
doesn't exist. Therefore, the first line of code isn't putting the %s
replacement in quotes, as I was told by you all it would. So I add quotes to
it and the interpreter complains on the second line of code that it's
unsubscriptable (because it's None). What gives?
First, you don't specify which .execute() is throwing the
exception. My guess is the 2nd. However, a little side-tour:
---[side tour]--
Well, while I'm not sure whether it's the root of your problem,
notice that the parameters should be
cursor.execute(sql, tuple_of_parameters)
Notice the difference between
print type((string.replace(client, '_', ' '))) # string
print type((string.replace(client, '_', ' '),)) # tuple
returns...hint, what you have is not a single-element tuple as
execute() expects. Once you're passing an expected tuple, it
should properly escape it. You might be getting a peculiar
side-effect of MySQL's DB-escaping (that string-formatting with a
non-tuple parameter acts like a one-element-tuple). However,
internally, coercion-to-tuple may be happening (as it may well on
a different DB backend), so you might be getting something like
tuple(replaced_string)
which gives you something weird like
('L', 'i', 'n', ...)
but if that was the case, I'd expect it would complain with a
"TypeError: not all arguments converted during string formatting"
unless the DB backend does smarter parsing of the parameters.
Additionally, using module version of string.replace() has been
deprecated in favor of just using the method on available on all
strings:
client.replace("_", " ")
---[end side tour]--
Verify that the value for "client" has the underscore in it
before you do your 2nd execute -- if the exception is what I
think it is, it sounds like you're creating the SQL with the
wrong client string. Verify it by pulling it out as a parameter:
sql = 'select * from %s' % (client)
print repr(sql)
cursor.execute(sql)
and verify that your SQL isn't
'select * from Lincoln Properties'
If your tablename does violate best practices by having a space
in it, then you'd need to hand-escape with whatever means MySQL
offers for escaping table/column/view names. In SQL Server, it's
[Lincoln Properties]
and in some others, I think it would be
`Lincoln Properties`
However, it's generally considered bad-practice to have
object-names (tables, columns, views, indexes, triggers,
stored-procedures, etc) that have spaces in their names.
-tkc
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Re: Another MySQL Problem
Ok, let's start all over again. When I have this code:
cursor.execute('select clientEmail from clients where client="%s"',
(client.replace('_', ' '),))
clientEmail = cursor.fetchone()[0]
I get this error:
/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py
67
68 '''
69
70 mailSpreadsheet()
71
mailSpreadsheet =
/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py in
mailSpreadsheet()
34 subject = 'Order From Client'
35 cursor.execute('select clientEmail from clients where client="%s"',
(client.replace('_', ' '),))
36 clientEmail = cursor.fetchone()[0]
37 cursor.execute('select * from %s', (client,))
38 data = cursor.fetchall()
clientEmail = 'jp...@lpc.com', cursor = ,
cursor.fetchone = >
TypeError: unsubscriptable object
args = ('unsubscriptable object',)
When I have this code:
print 'select clientEmail from clients where client="%s"' %
(client.replace('_', ' '),)
cursor.execute('select clientEmail from clients where client=%s',
(client.replace('_', ' '),))
clientEmail = cursor.fetchone()[0]
It prints this:
select clientAppelation, clientLast, clientEmail from clients where
client="Lincoln Properties" select clientEmail from clients where
client="Lincoln Properties"
and throws this error:
Traceback (most recent call last):
File "/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py", line 71,
in ?
mailSpreadsheet()
File "/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py", line 38,
in mailSpreadsheet
cursor.execute('select * from %s', (client,))
File "/usr/lib64/python2.4/site-packages/MySQLdb/cursors.py", line 163, in
execute
self.errorhandler(self, exc, value)
File "/usr/lib64/python2.4/site-packages/MySQLdb/connections.py", line 35,
in defaulterrorhandler
raise errorclass, errorvalue
ProgrammingError: (1064, "You have an error in your SQL syntax; check the
manual that corresponds to your MySQL server version for the right syntax to
use near ''Lincoln Properties'' at line 1")
Clearly, the results should not be "None". Please advise.
TIA,
beno
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the bugerrd code
The new mision I herits the buggered code (i do not the bugger). How do debugger him? Tahnk you very much. Vikhy :) -- http://mail.python.org/mailman/listinfo/python-list
Re: Another MySQL Problem
On Jun 23, 2010, at 9:12 AM, Paul Rubin wrote:
Stephen Hansen writes:
On 6/23/10 6:45 AM, Victor Subervi wrote:
cursor.execute('select clientEmail from clients where client=%s', ...
Do, 'client.replace("_", " ")' instead.
Er, look what happened to Little Bobby Tables (a quick web search on his
name should find his story) because someone wrote code like that.
Really, write the code a different way, with a prepared query.
I think you misread. He is using parameterized queries-- just
incorrectly, as addressed later that you didn't quote. He isn't using
string formatting to generate the SQL. The mysql layer just uses %s as
a marker.
The line you did quote was just about using string methods for the
data to pass into the parameterized query-- not for SQL purposes but
just because the data in the table apparently has spaces and the data
in this part of his app has underscores. For some reason.
--Stephen
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Re: Another MySQL Problem
On Jun 23, 2010, at 9:28 AM, Victor Subervi wrote:
Ok, let's start all over again. When I have this code:
cursor.execute('select clientEmail from clients where client="%s"',
(client.replace('_', ' '),))
clientEmail = cursor.fetchone()[0]
Already addressed this. Do not quote inside the SQL.
I get this error:
/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py
67
68 '''
69
70 mailSpreadsheet()
71
mailSpreadsheet =
/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py in
mailSpreadsheet()
34 subject = 'Order From Client'
35 cursor.execute('select clientEmail from clients where client="%s"',
(client.replace('_', ' '),))
36 clientEmail = cursor.fetchone()[0]
First do not use [0] om fetchone-- it returns one or None. Test if none.
It is returning NOne because there is no value that matched-- or those
quotes I said to remove are messing it up.
37 cursor.execute('select * from %s', (client,))
Even when you fix the above this wont work-- this is so bad.
You can only use parameterized queries-- the execute with the comma followed
by a tuple-- yo insert into the SQL data VALUES after the WHERE clause...
Not table names, not column names. SQL object names should be static.
You should not have a table named (client)_properties for each client. You
should have a table named properties with a field (which may be part of our
primary key) called client or some such, which contains the client name.
Its ok for a single table to have a lot of data.
When I have this code:
print 'select clientEmail from clients where client="%s"' %
(client.replace('_', ' '),)
cursor.execute('select clientEmail from clients where client=%s',
(client.replace('_', ' '),))
clientEmail = cursor.fetchone()[0]
The problem is not this line but:
File "/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py", line 38,
in mailSpreadsheet
cursor.execute('select * from %s', (client,))
This one. See above.
--Stephen via iPad.
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Re: Book review / advise
Stephen Hansen writes: > On 6/22/10 9:48 PM, John Bokma wrote: [..] > Its when you package it up in such a way that the buyer doesn't realize > what they're buying, that's where the problem comes-- and that's what is > happening quite a lot these days. Which is not the case here. > If it looks like a scam, take care personally. If it looks like a scam > and someone is asking about it, you don't sit by and say nothing. That's > inhuman. Yelling scam because you have a gut feeling is probably human, but I wouldn't call it ethical. -- John Bokma j3b Hacking & Hiking in Mexico - http://johnbokma.com/ http://castleamber.com/ - Perl & Python Development -- http://mail.python.org/mailman/listinfo/python-list
Re: Does a '_sre.SRE_Pattern' have state,or is it thread-safe?
On Jun 23, 2010, at 9:10 AM, John Nagle wrote: > '_sre.SRE_Pattern' is what "re.compile" returns. > > Is that a mutable object, with state that changes > during the parse, or is it an immutable constant? Can > two threads use the same '_sre.SRE_Pattern' at the same time? Ouch. I hope it is thread safe or I have some problems. But: since compiled regular expressions are automatically cached and used when one throws non compiled expressions into re, ISTM they have to be thread safe. Or we'd have tons of problems. --Stephen via iPad. -- http://mail.python.org/mailman/listinfo/python-list
ttk Scale: missing attributes
Tkinter's Scale widget had a `label` and a `resolution` attribute. These appear to be missing from the Ttk Scale widget. Is there a reason? These were important attributes. Thanks, Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
Re: Does a '_sre.SRE_Pattern' have state,or is it thread-safe?
John Nagle wrote: '_sre.SRE_Pattern' is what "re.compile" returns. Is that a mutable object, with state that changes during the parse, or is it an immutable constant? Can two threads use the same '_sre.SRE_Pattern' at the same time? (I'm writing something to find race conditions in existing code, which is why all these obscure introspection-related questions.) A compiled pattern instance is immutable and threadsafe. BTW, its methods don't release the GIL, so even if it wasn't threadsafe, it would still be safe. :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Instance method decorator garbage collection problem
On 06/23/2010 02:56 PM, John Reid wrote: > > > Thomas Jollans wrote: >>> The InstanceCounted.count is 1 at the end. If I omit the call to >>> "self.method = print_exception_decorator(self.method)" then the instance >>> count goes down to 0 as desired. I thought that the decorator might be >>> holding a reference to the instance through the bound method, so I added >>> the __del__() but it doesn't fix the problem. >> >> Adding __del__ like this does "fix the problem", but it introduces a new >> one: lacking a call to super().__del__, you simply don't decrement the >> instance count. > > Now that's a good point! I've added super().__del__ but the problem > remains for some reason. My A class now looks like: > > class A(InstanceCounted): > "A class that I want to decorate a method on." > def __init__(self): > super(A, self).__init__() > self.method = print_exception_decorator(self.method) > > def __del__(self): > super(A, self).__del__() > del self.method > > def method(self): > pass > > > Did you try this? No, I didn't. And, as Peter Otten pointed out, it wouldn't work anyway. But this will work: ## import sys from functools import wraps def print_exc(func): @wraps(func) def wrapper(*a, **kwa): try: return func(*a, **kwa) except: print 'Exception', sys.exc_info() raise return wrapper class InstanceCounted(object): count = 0 def __init__(self): type(self).count += 1 def __del__(self): type(self).count -= 1 class TestClass(InstanceCounted): def __init__(self): print 'TestClass initialized' super(TestClass, self).__init__() @print_exc def testmethod(self): print "Heureka", self if __name__ == '__main__': print '%d instances!' % TestClass.count TestClass() print '%d instances!' % TestClass.count t = TestClass() print '%d instances!' % TestClass.count t.testmethod() t2 = TestClass() print '%d instances!' % TestClass.count del t2 print '%d instances!' % TestClass.count del t print '%d instances!' % TestClass.count And the output is: 0 instances! TestClass initialized 0 instances! TestClass initialized 1 instances! Heureka <__main__.TestClass object at 0x7f39a6fc2ad0> TestClass initialized 2 instances! 1 instances! 0 instances! > >> >> To decorate a method, you'd best just decorate it normally. I doubt your >> technique will work anyway, as the function returned by the decorator >> isn't bound to the object, you'd need to pass one self reference >> implicitly, which is then thrown away. > > Looking at the original post, I had included an extra "self" in the > argument list > > def decorator(self, *args, **kwds): > > should have been > > def decorator(*args, **kwds): > > > With this correction my method decorates instance methods on objects > successfully although I don't know why the garbage collection isn't > working. > > > >> >> simply, >> >> def exc_decor(fn): >> @functools.wraps(fn) >> def wrapper(*args, **keywords): >> try: >> return fn(*args, **keywords): >> except: >> #... >> raise >> return wrapper >> >> class X(...): >>@exc_decor >>def foo(self, arg): >> pass >> >> (if targeting pre-decorator Python, the code would look different of >> course) >> >> This way, the function itself is decorated, and the function returned by >> the decorator is bound to the object. It'll just work as expected, no >> trickery required. > > Thanks for this. I remember having some problems decorating instance > methods in the past which is why I started doing it as in the original > post. Your method seems just fine though. > > Thanks, > John. > -- http://mail.python.org/mailman/listinfo/python-list
Re: Another MySQL Problem
On Wed, Jun 23, 2010 at 12:51 PM, Stephen Hansen wrote:
> The problem is not this line but:
>
>
> File "/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py", line
> 38, in mailSpreadsheet
> cursor.execute('select * from %s', (client,))
>
>
> This one.
>
Yes, can't use the comma, must use the percent. Will be the death of me.
Thanks,
beno
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Re: Another MySQL Problem
On Jun 23, 2010, at 11:20 AM, Victor Subervi
wrote:
On Wed, Jun 23, 2010 at 12:51 PM, Stephen Hansen wrote:
> The problem is not this line but:
>
>
> File "/var/www/html/globalsolutionsgroup.vi/mailSpreadsheet.py", line
> 38, in mailSpreadsheet
> cursor.execute('select * from %s', (client,))
>
>
> This one.
>
Yes, can't use the comma, must use the percent. Will be the death of me.
No, it is really --- never use the percent, always use the comma, redesign
your table layout so percent is unneeded. Fold all the properties tables
into one.
The above with a percent is a security risk. The code is vulnerable to
attack. Considering said vulnerability is now published online-- what can be
attacked will be attacked :)
--Stephen via iPad
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Re: Should I Learn Python or Ruby next?
On 6/23/2010 1:39 AM, Dennis Lee Bieber wrote: On Tue, 22 Jun 2010 15:55:51 -0700, Stephen Hansen declaimed the following in gmane.comp.python.general: I second Forth. Learning and using that was -- slightly painful, but Just pick up any advanced HP programmable calculator... RPL is a close substitute Or study the current CPython rpn stack machine. >>> from dis import dis >>> def f(a,b,c): return (a+b)*c >>> dis(f) 1 0 LOAD_FAST0 (a) 3 LOAD_FAST1 (b) 6 BINARY_ADD 7 LOAD_FAST2 (c) 10 BINARY_MULTIPLY 11 RETURN_VALUE -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Jew JUDGE shows off JEW POWER by BULLYING and BLACKMAILING a BLACK PRESIDENT OBAMA
FASCINATING !!! An ECOLOGICAL DISASTER is taking place. There is a need for HERCULEAN effort to STOP the oil spill. Then there is need for a THOROUGH study of the incident and EXEMPLARY PUNISHMENT of ALL THE OIL COMPANY BASTARDS, Brits, Halliburtons and ALL of them. But the JUDGE is worried about his interests ??? Recent disclosure documents indicate that Feldman, who was appointed to the bench by President Ronald Reagan, has had financial holdings in energy companies. Recent disclosure documents indicate that Feldman, who was appointed to the bench by President Ronald Reagan, has had financial holdings in energy companies. Recent disclosure documents indicate that Feldman, who was appointed to the bench by President Ronald Reagan, has had financial holdings in energy companies. On Jun 22, 8:30 pm, small Pox wrote: > Jew Judges NEVER came out against the CRIMES of BUSH and CHENEY and > LARRY S I L V E R S T E I N - The main player in 911 > > Jews are coming out from the directions of Corporations, Mafias, > Legislators, and now Judge to SUBVERT the UNITED STATES. > > Please listen to the Speech of Mr Benjamin H Freedman > onhttp://iamthewitness.com > to see how they BLACKMAILED President WOODROW WILSON to INSTALL a Jew > Judge BRANDEIS in the SUPREME COURT - the FIRST one > > http://abcnews.go.com/Politics/gulf-oil-spill-disaster-judge-overrule... > Judge Drills Hole in Deepwater Ban; Obama Promises Immediate Appeal > Judge: Drilling Moratorium 'Cannot Justify' Effects on Local Economy > > 123 comments > By ARIANE de VOGUE and JAKE TAPPER > WASHINGTON, June 22, 2010 > > A federal judge ruled today that the Interior Department had acted > "arbitrarily" when it issued a six-month moratorium on all pending, > current or approved drilling plans for new deepwater wells in the Gulf > of Mexico and Pacific Ocean and agreed to lift the ban. > Scientists believe oil is depleting water of oxygen, driving predators > to shore. > > Judge Martin L.C. Feldman granted a preliminary injunction to Hornbeck > Offshore Services to lift the moratorium, saying that the government > "failed to cogently reflect the decision to issue a blanket, generic, > indeed punitive, moratorium." > > The Administrative Procedure Act authorizes judges to review the > actions of executive branch agencies only if the action is found to be > "arbitrary, capricious, and abuse of discretion, or not otherwise in > accordance with the law." > > Feldman said a report by Secretary of the Interior Ken Salazar calling > for the moratorium went too far and that he was "unable to divine or > fathom a relationship between the findings and the immense scope of > the moratorium." > > Recent disclosure documents indicate that Feldman, who was appointed > to the bench by President Ronald Reagan, has had financial holdings in > energy companies. > > The Department of Justice said it would immediately appeal the > decision. > > On Jun 22, 2:38 pm, nanothermite911fbibustards > > - Hide quoted text - > - Show quoted text - > > wrote: > > The FASCINATING Secret Relationship Between PROFLIGATE WHITES and > > MISLEADER JEWS > > A fascinating relationship has existed between the PROFLIGATE WHITES > > of the European continent and the MISLEADING and MANIPULATING JEWS > > for more than a thousand years. > > The understanding of the world history can never commence without a > > focus on this historical point of view. > > We will slowly slowly reveal parts of this comprehensive treatise. -- http://mail.python.org/mailman/listinfo/python-list
Re: Should I Learn Python or Ruby next?
On Wed, 23 Jun 2010 04:25:38 +0100, rantingrick wrote: On Jun 22, 9:31 pm, MRAB wrote: [snip] Napoleon once said "Never interrupt your enemy when he is making a mistake."! :-) And how exactly does your example express itself in a more "syntactically-correct" "linear-flow" than the two code snippets i provided earlier, hmmm? You did rather carefully pick an example where Python's syntax flow the other way round and then present all the least Pythonic paraphrases of the Ruby functional approach. -- Rhodri James *-* Wildebeeste Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
How to send a non-standard IMAP command?
Dear Pythoners, I need to send one line of commands to an IMAP server. The commands are not standard IMAP protocols, hence it's not specified in http://docs.python.org/library/imaplib.html. Can you please give me a hint? Best regards, Xianwen -- http://mail.python.org/mailman/listinfo/python-list
Pythonic Idiom For Searching An Include Path
Given a program 'foo' that takes a command line argument '-I includefile', I want to be able to look for 'includefile' in a path specified in an environment variable, 'FOOPATH'. I'd like a semantic that says: "If 'includefile' contains one or more path separator characters, ignore 'FOOPATH'. If it contains no path separators, look for it in the paths specified by 'FOOPATH', beginning with the leftmost path first." Is there a standard Pythonic idiom for doing this or do I need to cook up my own. TIA, -- Tim Daneliuk tun...@tundraware.com PGP Key: http://www.tundraware.com/PGP/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Should I Learn Python or Ruby next?
On Jun 23, 4:43 pm, "Rhodri James"
wrote:
> > And how exactly does your example express itself in a more
> > "syntactically-correct" "linear-flow" than the two code snippets i
> > provided earlier, hmmm?
>
> You did rather carefully pick an example where Python's syntax flow the
> other way round
"rather carefully picked" you say? As if built-in functions are hardly
ever used? No I think *your* statement was "rather carefully picked"
to try and discredit me. Sorry my friend that might work on the less
astute readers round here, but it has no effect on me ;-)
> and then present all the least Pythonic paraphrases of the
> Ruby functional approach.
What? Did you just use the words "Pythonic" and "Ruby" in the same
sentence all the while keeping a strait face? Ruby's naturally linear
phrasing is one thing i like about the language (and map of course),
short of those two niceties i prefer Python.
Would you like to present another way of achieving the same code that
makes Python look better, i would love to see it. Here is an even more
interesting example of "Ruby linear-flow" verses "Python lisp-style-
nesting"...
RUBY:
["three","one","two"].map{|x| x.capitalize}.sort.join(',')
PYTHON
','.join(sorted(map(lambda x:x.title(), ["three", "one", "two"])))
I do the Python code all the time without thinking twice about it. But
to a noob i'll bet Ruby is more decipherable in these cases. It's
ironic that Python was created by a westerner and we read it from
right to left, and Ruby was created by a easterner and we read it left
to right. Go figure?
;-)
--
http://mail.python.org/mailman/listinfo/python-list
Re: Should I Learn Python or Ruby next?
> Would you like to present another way of achieving the same code that
> makes Python look better, i would love to see it. Here is an even more
> interesting example of "Ruby linear-flow" verses "Python lisp-style-
> nesting"...
>
> RUBY:
> ["three","one","two"].map{|x| x.capitalize}.sort.join(',')
>
> PYTHON
> ','.join(sorted(map(lambda x:x.title(), ["three", "one", "two"])))
','.join(x.title() for x in sorted(["three", "one", "two"]))
> I do the Python code all the time without thinking twice about it. But
> to a noob i'll bet Ruby is more decipherable in these cases. It's
> ironic that Python was created by a westerner and we read it from
> right to left, and Ruby was created by a easterner and we read it left
> to right. Go figure?
You read Python from right-to-left; "we" don't-- I don't.
--Stephen via iPad.
--
http://mail.python.org/mailman/listinfo/python-list
Re: How to send a non-standard IMAP command?
On 06/23/2010 05:22 PM, Xianwen Chen wrote: I need to send one line of commands to an IMAP server. The commands are not standard IMAP protocols, hence it's not specified in http://docs.python.org/library/imaplib.html. Sounds like you want to use the imaplib's IMAP4.xatom() to send a custom command to your IMAP server: http://docs.python.org/library/imaplib.html#imaplib.IMAP4.xatom Given that you don't detail what you want to send or expect back, it's a little hard to give you more than that, but at least that should get you started. However, the full source to imaplib is in your $PYTHONLIB directory so you can see how other commands are implemented and responses are interpreted. -tkc -- http://mail.python.org/mailman/listinfo/python-list
modifying standard library functionality (difflib)
Hi all, I'd like to ask about the most reasonable/recommended/... way to modify the functionality of the standard library module (if it is recommended at all). I'm using difflib.SequenceMatcher for character-wise comparisons of the texts; although this might not be a usual use case, the results are fine for the given task; however, there were some cornercases, where the shown differences were clearly larger than needed. As it turned out, this is due to a kind of specialcasing of relatively more frequent items; cf. http://bugs.python.org/issue1528074#msg29269 http://bugs.python.org/issue2986 The solution (or workaround) for me was to modify the SequenceMatcher class by adding another parameter checkpopular=True which influences the behaviour of the __chain_b function accordingly. The possible speed issues with this optimisation turned off (checkpopular=False) don't really matter now and the comparison results are much better for my use cases. However, I'd like to ask, how to best maintain this modified functionality in the sourcecode. I tried some possibilities, which seem to work, but I'd appreciate suggestions on the preferred way in such cases. - It is simply possibly to have a modified sourcefile difflib.py in the script directory. - Furthermore one can subclass difflib.SequenceMatcher an overide its __chain_b function (however the name doesn't look like a "public" function ... - I guess, it wouldn't be recommended to directly replace difflib.SequenceMatcher._SequenceMatcher__chain_b ... In all cases I have either a copy of the whole file or the respective function as a part of my source. I'd appreciate comments or suggestions on this or maybe another better approaches to this problem. Thanks in advance, vbr -- http://mail.python.org/mailman/listinfo/python-list
Re: Pythonic Idiom For Searching An Include Path
On Wed, Jun 23, 2010 at 3:27 PM, Tim Daneliuk wrote: > Given a program 'foo' that takes a command line argument '-I > includefile', I want to be able to look for 'includefile' in a path > specified in an environment variable, 'FOOPATH'. > > I'd like a semantic that says: > > "If 'includefile' contains one or more path separator characters, > ignore 'FOOPATH'. If it contains no path separators, look for it in > the paths specified by 'FOOPATH', beginning with the leftmost path > first." > > Is there a standard Pythonic idiom for doing this or do I need to cook > up my own. Cook your own. Also, I certainly wouldn't call something this complex a mere idiom. You will find optparse, os.sep, and os.walk helpful in writing your code. Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
[ANN] filepath 0.1
Hello all, I'm happy to announce the initial release of filepath. filepath is an abstract interface to the filesystem. It provides APIs for path name manipulation and for inspecting and modifying the filesystem (for example, renaming files, reading from them, etc). filepath's APIs are intended to be easier than those of the standard library os.path module to use correctly and safely. filepath is a re-packaging of the twisted.python.filepath module independent from Twisted (except for the test suite which still depends on Twisted Trial). The low number of this release reflects the newness of this packaging. The implementation is almost entirely mature and well tested in real- world situations from its time as part of Twisted. You can find the package on PyPI or Launchpad: http://pypi.python.org/pypi/filepath/0.1 https://launchpad.net/filepath Jean-Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Jew JUDGE shows off JEW POWER by BULLYING and BLACKMAILING a BLACK PRESIDENT OBAMA
On Jun 23, 2:02 pm, nanothermite911fbibustards wrote: > FASCINATING !!! > An ECOLOGICAL DISASTER is taking place. > There is a need for HERCULEAN effort to STOP the oil spill. > Then there is need for a THOROUGH study of the incident and EXEMPLARY > PUNISHMENT of ALL THE OIL COMPANY BASTARDS, Brits, Halliburtons and > ALL of them. > But the JUDGE is worried about his interests ??? > > Recent disclosure documents indicate that Feldman, who was appointed > to the bench by President Ronald Reagan, has had financial holdings in > energy companies. > > Recent disclosure documents indicate that Feldman, who was appointed > to the bench by President Ronald Reagan, has had financial holdings in > energy companies. > > Recent disclosure documents indicate that Feldman, who was appointed > to the bench by President Ronald Reagan, has had financial holdings in > energy companies. > You would be hard pressed to find a judge in the area who doesn't hold energy company stocks. The judge has not yet done the latest disclosure. I really hope that it turns out he is merely wrong and not corrupt but I would not bet on it. -- http://mail.python.org/mailman/listinfo/python-list
Re: print line number and source filename
On Tue, Jun 22, 2010 at 12:13 PM, Stephen Hansen
wrote:
> On 6/22/10 9:44 AM, Peng Yu wrote:
>> Also, always importing the inspect module and getting the frame and
>> accessing the lineno from the frame is not very convenient to type. Is
>> there a shorter way to access the line number (for example, in C++ and
>> perl, __LINE__ can be used to access line number, which is much more
>> convenient than the way that I found in python).
>
> This all seems to be reinventing the wheel. Have you seen the logging
> module?
>
> Given this toy file:
>
> begin -
> import logging
> logging.basicConfig(level=logging.DEBUG,format="%(asctime)s
> %(levelname)-5.5s [%(name)s %(module)s:%(funcName)s:%(lineno)d]
> %(message)s")
>
> def run():
> x = 5
> logging.debug("X = %d" % x)
>
> run()
> - end -
>
> 2010-06-22 10:12:07,907 DEBUG [root test:run:6] X = 5
>
> It outputs exact time, type of log message, the name of the logger
> (That's the 'root' -- you can skip if you only use one), the exact
> module (test.py), function (run) and line (6).
I tried to put the above code in a module. Say in a.b.__init__.py
%(module)s only print to "__init__". However, I need the fullname
a.b.__init__. I looked at the manual, but I don't see what format
string I should supply. Would you please let me know?
--
Regards,
Peng
--
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Re: Jew JUDGE shows off JEW POWER by BULLYING and BLACKMAILING a BLACK PRESIDENT OBAMA
On Wed, 23 Jun 2010 19:10:45 -0700 (PDT), MooseFET wrote: >On Jun 23, 2:02 pm, nanothermite911fbibustards > wrote: >> FASCINATING !!! >> An ECOLOGICAL DISASTER is taking place. >> There is a need for HERCULEAN effort to STOP the oil spill. >> Then there is need for a THOROUGH study of the incident and EXEMPLARY >> PUNISHMENT of ALL THE OIL COMPANY BASTARDS, Brits, Halliburtons and >> ALL of them. >> But the JUDGE is worried about his interests ??? >> >> Recent disclosure documents indicate that Feldman, who was appointed >> to the bench by President Ronald Reagan, has had financial holdings in >> energy companies. >> >> Recent disclosure documents indicate that Feldman, who was appointed >> to the bench by President Ronald Reagan, has had financial holdings in >> energy companies. >> >> Recent disclosure documents indicate that Feldman, who was appointed >> to the bench by President Ronald Reagan, has had financial holdings in >> energy companies. >> > >You would be hard pressed to find a judge in the area who doesn't >hold energy company stocks. The judge has not yet done the latest >disclosure. I really hope that it turns out he is merely wrong and >not corrupt but I would not bet on it. You're absolutely clueless. -- http://mail.python.org/mailman/listinfo/python-list
Does "distutils" support "python setup.py test"?
Many library modules support "python setup.py test", but the Python distutils documentation at http://docs.python.org/distutils/configfile.html makes no mention of it, except as a possible future extension. Some setup.py files have test_suite = "modulename" but that doesn't seem to do anything with the stock core.distutils. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Types missing from "types"module
Here's dir(types), in Python 2.6.5: ['BooleanType', 'BufferType', 'BuiltinFunctionType', 'BuiltinMethodType', 'ClassType', 'CodeType', 'ComplexType', 'DictProxyType', 'DictType', 'DictionaryType', 'EllipsisType', 'FileType', 'FloatType', 'FrameType', 'FunctionType', 'GeneratorType', 'GetSetDescriptorType', 'InstanceType', 'IntType', 'LambdaType', 'ListType', 'LongType', 'MemberDescriptorType', 'MethodType', 'ModuleType', 'NoneType','NotImplementedType', 'ObjectType', 'SliceType', 'StringType', 'StringTypes', 'TracebackType', 'TupleType', 'TypeType', 'UnboundMethodType', 'UnicodeType', 'XRangeType', '__builtins__', '__doc__', '__file__', '__name__', '__package__'] Seems to be missing SetType, FrozenSetType, BytesType, and ByteArrayType. Anything else missing? (Arguably, "bytes" isn't really distinguished until 3.x, but still...) John Nagle -- http://mail.python.org/mailman/listinfo/python-list
best way to increment an IntVar?
Of course one can do myintvar.set(myintvar.get()+1) but surely there is a better way? I'm surprsied that myintvar += 1 is not allowed. Thanks, Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
Re: Types missing from "types"module
Sent from my iPad On Jun 23, 2010, at 9:24 PM, John Nagle wrote: > Here's dir(types), in Python 2.6.5: > > ['BooleanType', 'BufferType', 'BuiltinFunctionType', 'BuiltinMethodType', > 'ClassType', 'CodeType', 'ComplexType', 'DictProxyType', 'DictType', > 'DictionaryType', 'EllipsisType', 'FileType', 'FloatType', 'FrameType', > 'FunctionType', 'GeneratorType', 'GetSetDescriptorType', 'InstanceType', > 'IntType', 'LambdaType', 'ListType', 'LongType', 'MemberDescriptorType', > 'MethodType', 'ModuleType', 'NoneType','NotImplementedType', 'ObjectType', > 'SliceType', 'StringType', 'StringTypes', 'TracebackType', 'TupleType', > 'TypeType', 'UnboundMethodType', 'UnicodeType', 'XRangeType', '__builtins__', > '__doc__', '__file__', '__name__', '__package__'] > > Seems to be missing SetType, FrozenSetType, BytesType, and > ByteArrayType. Anything else missing? > > (Arguably, "bytes" isn't really distinguished until 3.x, but > still...) > > John Nagle > -- > http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Types missing from "types"module
On Jun 23, 2010, at 9:24 PM, John Nagle wrote: > Here's dir(types), in Python 2.6.5: > > ['BooleanType', 'BufferType', 'BuiltinFunctionType', 'BuiltinMethodType', > 'ClassType', 'CodeType', 'ComplexType', 'DictProxyType', 'DictType', > 'DictionaryType', 'EllipsisType', 'FileType', 'FloatType', 'FrameType', > 'FunctionType', 'GeneratorType', 'GetSetDescriptorType', 'InstanceType', > 'IntType', 'LambdaType', 'ListType', 'LongType', 'MemberDescriptorType', > 'MethodType', 'ModuleType', 'NoneType','NotImplementedType', 'ObjectType', > 'SliceType', 'StringType', 'StringTypes', 'TracebackType', 'TupleType', > 'TypeType', 'UnboundMethodType', 'UnicodeType', 'XRangeType', '__builtins__', > '__doc__', '__file__', '__name__', '__package__'] > > Seems to be missing SetType, FrozenSetType, BytesType, and > ByteArrayType. Anything else missing? > > (Arguably, "bytes" isn't really distinguished until 3.x, but > still...) IIUC, since Python 2.2ish you can't treat the types module as comprehensive. It exists as a remnant from the time when there was a difference between types and classes. Sets and the recent additions exist solely in this new world where we just isinstance(blah, set) or issubclass or whatnot. --Stephen via iPad -- http://mail.python.org/mailman/listinfo/python-list
Re: best way to increment an IntVar?
Alan G Isaac writes: > Of course one can do > myintvar.set(myintvar.get()+1) > but surely there is a better way? What is an IntVar? It's not a built-in type, so you'll need to tell us. type(myintvar) Where is it imported from? import sys sys.modules[type(myintvar).__module__] > I'm surprsied that > myintvar += 1 > is not allowed. Does the documentation lead you to believe it would be allowed? help(type(myintvar)) -- \ “I cannot be angry at God, in whom I do not believe.” —Simone | `\ De Beauvoir | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: best way to increment an IntVar?
On Jun 24, 12:07 am, Ben Finney wrote: > Alan G Isaac writes: > > > Of course one can do > > myintvar.set(myintvar.get()+1) > > but surely there is a better way? > > What is an IntVar? It's not a built-in type, so you'll need to tell us. For those who don't know; IntVar is from the module Tkinter. It is a class to contain an integer control var used to update Tkinter widgets that support it. @OP: No there is not an __iadd__ method in the IntVar class but if you really, really want to update this way just subclass IntVar and create the method yourself. OOP is cool like dat! You can also configure a Tkiter widget via the Python syntax w[key] = value OR w.config(key1=value1, key2=value2, ...) -- http://mail.python.org/mailman/listinfo/python-list
Re: Another MySQL Problem
On 6/23/2010 10:59 PM, Dennis Lee Bieber wrote: On Wed, 23 Jun 2010 11:58:24 -0430, Victor Subervi declaimed the following in gmane.comp.python.general: When I have this code: And yes -- it IS an error... You are AGAIN trying to use parameters for SCHEMA entities, not data. Yes. Please post your CREATE statements, so we can see your database schema. If you really have one table per client, you're doing it wrong. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Types missing from "types"module
On 6/23/2010 10:08 PM, Stephen Hansen wrote: On Jun 23, 2010, at 9:24 PM, John Nagle wrote: Here's dir(types), in Python 2.6.5: ['BooleanType', 'BufferType', 'BuiltinFunctionType', 'BuiltinMethodType', 'ClassType', 'CodeType', 'ComplexType', 'DictProxyType', 'DictType', 'DictionaryType', 'EllipsisType', 'FileType', 'FloatType', 'FrameType', 'FunctionType', 'GeneratorType', 'GetSetDescriptorType', 'InstanceType', 'IntType', 'LambdaType', 'ListType', 'LongType', 'MemberDescriptorType', 'MethodType', 'ModuleType', 'NoneType','NotImplementedType', 'ObjectType', 'SliceType', 'StringType', 'StringTypes', 'TracebackType', 'TupleType', 'TypeType', 'UnboundMethodType', 'UnicodeType', 'XRangeType', '__builtins__', '__doc__', '__file__', '__name__', '__package__'] Seems to be missing SetType, FrozenSetType, BytesType, and ByteArrayType. Anything else missing? (Arguably, "bytes" isn't really distinguished until 3.x, but still...) IIUC, since Python 2.2ish you can't treat the types module as comprehensive. It exists as a remnant from the time when there was a difference between types and classes. Sets and the recent additions exist solely in this new world where we just isinstance(blah, set) or issubclass or whatnot. Ah. That makes sense. Does the "types" module go away in 3.x, then? John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Types missing from "types"module
On Thu, Jun 24, 2010 at 12:29 AM, John Nagle wrote: > Does the "types" module go away in 3.x, then? Not entirely, but it is greatly reduced. -- http://mail.python.org/mailman/listinfo/python-list
