KDr2 wrote:
cmd= isinstance(cmd,str) and c.replace('${ADDR}',ip) or cmd
Perlish, but I like that. :-)
Regards,
mk
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Hello everyone,
I have a problem with a threaded program: it frequently hangs on sys.exit.
The problem is that my program uses threads which in turn use paramiko
library, which itself is threaded.
I try to gracefully close the threads (below), but it doesn't always
work, if paramiko calls ha
in this context this is fine. But I wanted to make the class more
robust. Perhaps I should do smth like this before setting self.cmd?
assert isinstance(cmd, basestring) or cmd is None, "cmd should be string
or None"
and then:
if cmd:
self.cmd = cmd.replace..
?
Entir
W. eWatson wrote:
I'd like to draw something like an animal track. Between each point is a
line. Perhaps the line would have an arrow showing the direction of
motion. There should be x-y coordinates axises. PIL? MatPlotLib, ??
Pycairo?
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Bruno Desthuilliers wrote:
if cmd:
self.cmd = cmd.replace..
And what if cmd happens to be the empty string ?-)
ok, me --->[]
Right, I didn't think much when I wrote that. Anyway, that's back to
square one.
I will probably go for this anyway:
assert isinstance(cmd, basestring)
Jean-Michel Pichavant wrote:
Why not dump the whole thing and use Pyro, which works beautifully and
handles all the serialization business by itself, you get a Python
object on the other side? Unless xmlrpc has to be at the other end, that is.
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Jean-Michel Pichavant wrote:
> To be honest I have not enough courrage to dive into yout 1000 lines of
> script :-)
Understandable.
> What I can say however:
>
> 1/ your interface is somehow broken. You ask actions through options (-c
> -y -s), meaning one can possibly use all these 3 options
Jean-Michel Pichavant wrote:
mk wrote:
W. eWatson wrote:
I'd like to draw something like an animal track. Between each point
is a line. Perhaps the line would have an arrow showing the direction
of motion. There should be x-y coordinates axises. PIL? MatPlotLib, ??
Pycairo?
turtle
uses threads.
How do I kill brutally its threads? Is there any way to do it?
Regards,
mk
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Ethan Furman wrote:
http://www1.american.edu/academic.depts/cas/econ/faculty/isaac/choose_python.pdf
Choose to get your difficult questions about threads in Python ignored.
Oh well..
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mk wrote:
> What I can say however:
>
> 1/ your interface is somehow broken. You ask actions through options (-c
> -y -s), meaning one can possibly use all these 3 options together. Your
> code won't handle it (you are using elif statements). What happens if I
&g
Julian wrote:
For those guys would be a poster quite cool which describes the most
popular and beloved python features.
Dictionaries.
A workhorse of Python, by far the most useful data structure.
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Steven D'Aprano wrote:
On Fri, 05 Feb 2010 18:29:07 +0100, mk wrote:
Ethan Furman wrote:
http://www1.american.edu/academic.depts/cas/econ/faculty/isaac/
choose_python.pdf
Choose to get your difficult questions about threads in Python ignored.
Oh well..
With an attitude like
ith conditions/events/whatever and the thread
cooperating and exiting on its own.
I will probably have to get the library author look at this.
Regards,
mk
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rying to obtain.
Anybody knows of such possibility?
Regards,
mk
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t call last):
File "", line 1, in
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc4 in position 0:
ordinal not in range(128)
There's logic to this, although it makes my brain want to explode. :-)
Regards,
mk
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se" statement at the start of that handler.
This will re-raise the same exception, which will presumably not be
caught a second time?
I don't know where the handler is, that is precisely a problem. I'm
trying to locate that handler.
Regards,
mk
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tance*? That is, how do I know who's the caller?
Regards,
mk
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C)
paramiko uses close to 100% of CPU when negotiating with such broken or
unresponsive hosts.
For my reasons, I need to get this fixed.
Regards,
mk
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Stephen Hansen wrote:
the uncommon, the exceptional, case. If one could somehow turn off
exceptions, you can't even do a for loop: every for loop would become
infinite-- exceptions are how Python signals the end of an iterator.
Think about that, *every* for loop in Python suddenly breaks.
Hm
Paul Rubin wrote:
mk writes:
Um... run your code in a debugger.
..except the code in question is multithreaded and pdb is no good for
that, and last time I checked, yappi was broken.
Try winpdb.org.
This is a treasure! In minutes I've had this attached to remote process
and debu
. Thanks!
Regards,
mk
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Same as me, except I get lots of exceptions in threads if I shut down
with sys.exit. SIGTERM somehow gets around this problem.
I'll try os._exit.
Regards,
mk
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Aahz wrote:
You can also use os._exit().
Thanks!
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Aahz wrote:
You can also use os._exit().
Yes! It works cleanly! Thanks a million!
OTOH, if I use sys.exit(), it's just hanging there.
Regards,
mk
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g 'helpful' in a bad way!
And the default encoding is coded in such way so it cannot be changed in
sitecustomize (without code modification, that is).
Regards,
mk
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d in a function.
Regards,
mk
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I found this:
http://effbot.org/zone/metaclass-plugins.htm
(Although I'm not entirely sure this is the best approach for the web app)
How would you approach designing such architecture using features
available in Python (and some major web framework, like Pylons or Django)?
Regar
ktop. What's up?
I've had these messages (key) occur on other Python installs as I
transition to Win7. So far no problem.
You may want to consider dumping the thing and going for PyInstaller,
which in my experience is better and has friendly developer community
behind i
W. eWatson wrote:
P.S. I didn't really use PyInstaller on Windows, though -- just on
Linux, where it works beautifully.
Regards,
mk
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_(self, arg)
D.__init__(self, arg)
def some(self):
self.met()
def overriden(self):
print "I'm really E's method"
e = E(10)
print 'MRO:', ' '.join([c.__name__ for c in E.__mro__])
e.some()
e.calling_overriden()
Result:
...
to kill small kittens.
Regards,
mk
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Bruno Desthuilliers wrote:
mk a écrit :
P.S. Method resolution order in Python makes me want to kill small
kittens.
mro is only a "problem" when using MI.
Oh sure! And I have the impression that multiple inheritance is not used
all that often. What (some) Python code I'
into detail here:
http://www.artima.com/weblogs/viewpost.jsp?thread=246488
Thanks Kurt, I will certainly look into that!
Regards,
mk
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iously, however, suppose tagdata or smth like this
is really large? It would make sense to make it class attribute and not
instance attribute. So I'm trying to work out if there's a way to do it.
Regards,
mk
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>>> class Person(object):
... pass
...
>>> class Friendly(object):
... def hello(self):
... print 'hello'
...
>>>
>>> Person.__bases__ += (Friendly,)
Traceback (most recent call last):
File "", line 1, in
TypeError: Cannot create a consistent method resolution
order (MRO) fo
be called __print_internal_date really. ;-)
I wonder if I'm not trying to make Python things it shouldn't be doing,
but it's the problem at hand that is leading me into this conundrum: all
other functions for tagdata use single arguments. I should probably code
around that anyway..
Regards,
mk
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Stephen Hansen wrote:
Or just leave it as a top level function where it was perfectly happy to
live :)
Yes. This is probably the sanest solution anyway, because probably
having many such functions to use, packing them into smth like
package.utils anyway is a good idea. I'm trying mainly to le
Hello everyone,
Disclaimer: I'm doing this mainly for learning purposes, to feel what
it's good for.
I'm trying to get print_internal_date become a static method AND to
refer to it in a class attribute 'tagdata' dict.
class PYFileInfo(FileInfo):
'python file properties'
@staticmeth
Bruno Desthuilliers wrote:
I think I know where the problem is: what resides in tagdata is a
static method 'wrapper', not the function itself, according to:
Indeed. Sorry, I'm afraid I gave you bad advice wrt/ using a
staticmethod here - I should know better :( (well, OTHO staticmethods
are n
t object in the argument's list
and returns the result of calling the wrapped function object.
Aha! So that's the mechanism that makes self magically appear in an
argument list! I always wondered how it worked. !!THANKS!!
My 2 cents...
Well, Bruno -- that was more like $200!
Regards,
mk
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Bruno Desthuilliers wrote:
class Foo4(object):
""" working solution 2 : use a lambda """
@staticmethod
def bar(baaz):
print baaz
tagada = {'bar': lambda x : Foo4.bar(x)}
def test(self, baaz):
self.tagada['bar'](baaz)
Huh? How does this one work? After al
Bruno Desthuilliers wrote:
I think you broke something somewhere. Assuming you're using Python 2.x
(>= 2.3 IIRC), my above code works.
ARGH! Forgot the "delayed staticmethod" line -- in effect I called
staticmethod twice:
@staticmethod
def print_internal_date(filename):
f =
been replaced, but if so, why
nostatget doesn't get called?
Regards,
mk
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Steven D'Aprano wrote:
On Thu, 18 Feb 2010 18:28:44 +0100, mk wrote:
nostat.__orig_get__ = nostat.__get__
I should point out that leading-and-trailing-double-underscore names are
reserved for use by the language.
Right... I completely missed that. I will try to change the habi
its old self (so quite likely it was
the new, nostatget, descriptor).
But Bruno pointed out that I need instancemethod for that, not plain
function.
Regards,
mk
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generated this
way be considered truly random? (I abstract from not-quite-perfect
nature of /dev/urandom at the moment; I can always switch to /dev/random
which is better)
Regards,
mk
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ss
time by using advanced programming langauges. Frankly, I have yet to
encounter a problem for which either a sizable Python extension or
bindings to a popular library wouldn't exist. This in itself is a
hallmark of a language being "enough of mainstream to actually matter
based on
(percentage of job offers with the keyword "php" in them).
Regards,
mk
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sure about your field of application (never done anything like
that), but I found pyparsing highly usable.
Regards,
mk
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Of course. Multithreading also fails miserably if the threads all try
to call exec() or the equivalent.
It works fine if you use os.fork().
What about just using subprocess module to run system commands in worker
threads? Is this likely to have problems?
Regards,
mk
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Hello everyone,
Is there smth like AKKA in Python?
http://akkasource.org/
Regards,
mk
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ughtful and may help you understand the relevant issues.
Thanks. But I would also be grateful for indicating what is wrong/ugly
in my code.
Regards,
mk
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x27;'.join([chr(ord('a')+ord(c)%26) for c in f.read(n)])
print randomword(nletters)
Aw shucks when will I learn to do the stuff in 3 lines well instead of
20, poorly. :-/
Regards,
mk
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Interesting, and I was thinking that UK sample was big enough for such
things not to matter.
Regards,
mk
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ou will have to add those extensions in
"hook" script.
Regards,
mk
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ffort (on and off) with programming in
Python is under a year.
Regards,
mk
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f the
world) were computed the same way (random hexdigit and just mod it when
it's too large) leading to a high probability that your first digit was
a 1 :)
Schadenfreude is deriving joy from others' misfortunes; what is the
German word, if any, for deriving solace from others' misfortunes? ;-)
Regards,
mk
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oblem itself: why is the damn
distribution not uniform?
Regards,
mk
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Get a decent editor, like PyScripter, and press Ctrl-' (toggle comment).
Regards,
mk
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f 3795
t 3784
p 3765
j 3730
i 3704
Better, although still not perfect.
Regards,
mk
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On 2010-02-24 20:19, Robert Kern wrote:
On 2010-02-24 13:09 PM, mk wrote:
On 2010-02-24 20:01, Robert Kern wrote:
I will repeat my advice to just use random.SystemRandom.choice() instead
of trying to interpret the bytes from /dev/urandom directly.
Oh I hear you -- for production use I would
n't trust the PRNG.
I just posted a comparison with calculating std deviations for various
methods - using os.urandom, SystemRandom.choice with seeding and without
seeding.
They all seem to have slightly different distributions.
Regards,
mk
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long as the values are the same.
I was wondering if there's a better / shorter / faster way to do this --
not necessarily in the same variant, e.g. variant where order of two
lists matters would be interesting as well.
Regards,
mk
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On 2010-02-25 03:04, Gabriel Genellina wrote:
Also try:
import antigravity
Is this Py3 egg? My 2.6 doesn't seem to get it.
Regards,
mk
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On 2010-02-25 02:07, Steven D'Aprano wrote:
On Wed, 24 Feb 2010 18:23:17 +0100, mk wrote:
Anyway, the passwords for authorized users will be copied and pasted
from email into in the application GUI which will remember it for them,
so they will not have to remember and type them in.
same number of occurences,
you can do
return sorted(qips) == sorted(oldqips)
assuming that all elements in the lists are comparable.
Thanks!
Regards,
mk
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l have to be worked out, but the project didn't
get to that stage yet, it's all still in planning stages. I just wanted
to have this one part (password generation) researched before I get to
other stages so I don't have to implement this later in haste and do
smth wrong.
Regards,
mk
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to change.
There's also ultra-cool-and-modern Tokyo Cabinet key:value store with
Python bindings:
http://pypi.python.org/pypi/pytc/
I didn't test it, though.
Regards,
mk
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if someone here did
perhaps they will shed some light on it?
Regards,
mk
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al transactions, you have to choose InnoDB table type
but then you lose much of the performance. Etc.
No, if you have a choice, avoid MySQL and go for PGSQL. It's fantastic,
if (necessarily) complex.
Regards,
mk
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n AND programmer 1 knows what params 1-7
do, programmer 2 knows what params 8-15 do and nobody knows what params
16-20 do.
Seriously.
Regards,
mk
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Tobiah wrote:
Now that I use python, this is the amount of time
per day that I spend adding forgotten semicolons while
debugging other languages.
My objects are flat and I don't know who's Guido.
I blame it all on Python.
How about a PEP "Let's make Python look lik
ey
create 'subprocess' namespace in a class or instance, respectively.
Is there anyway to make it a global import?
Regards,
mk
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Where do you take class Email from? There's no info in your mail on this.
Regards,
mk
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it sounds like Python already does what you want. You
don't need to do anything special.
Oh, thanks!
Hmm it's different than dealing with packages I guess -- IIRC, in
packages only code in package's __init__.py was executed?
Regards,
mk
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to do the "right thing" may indeed get one in trouble in
case of deadlock caused by a bug in one's own program.
Regards,
mk
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ching scarce resources thin"
either: abominations completely unfit to live waste little in the way of
resources, and we learn a deal off them too.
There are demonstrable benefits to this too: I for one am happy that
ReST is available for me and I don't have to learn a behemoth s
eek"ing you could write a function that could e.g. acquire a lock,
do a copy of the queue, release the lock, and return the copy to the
object wanting to examine the queue.
I have used this approach (although with a list, not a dictionary -- I
haven't had the need to do extensive sea
ase of complicated object
hierarchies it supposedly generates a lot of JOINs and that supposedly
kills DB performance.
So there *may* be some evidence that joins are indeed bad in practice.
If someone has smth specific/interesting on the subject, please post.
Regards,
mk
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dred lines but took 5 minutes to compile; "VAX" was
theoretically multitasking, but when more than 3 people were trying to
do smth on it simultaneously, it was basically seizing up.
Regards,
mk
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*10
...
>>> sys.getsizeof(a)
25165960
So that's what, 25 MB?
Although I have to note that TEMPORARY ram usage in Python process on my
machine did go up to 113MB.
Regards,
mk
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But according
to top RSS of the python process is 300MB. ps auxw says the same thing
(more or less).
Why the 50% overhead? (and I would swear that a couple of times RSS
according to top grew to 800MB).
Regards,
mk
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t)
135709728
>>> id(dict)
135714560
>>> id(dict)
135714560
>>> c=dict
>>> id(c)
135714560
2. Drawbacks?
3. Better/fancier way to do this?
Regards,
mk
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ay be
"one obvious way to do it" in a very, very narrow context, but when
contexts widen, like, say: "what is web framework I should choose?" the
answers diverge, because answer has to be variation of "it depends on
your situation".
Whether RSON is really an
g the first table, with stored procedures to ensure you still have
correct data in all tables.
Regards,
mk
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do not know if it's true,
it's because Gates fancied using / for options switch instead of -, and
to hell with established practice.
Regards,
mk
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Have you looked in a file easy-install.pth in site-packages? In my
experience it's enough to delete the line for package from there and
delete package's egg or directory.
I agree that this is kind of backward, though.
Regards,
mk
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joins apparently are at least twice as expensive as simple
selects without joins, on a small dataset. Not a drastic increase in
cost, but smth definitely shows.
It would be interesting to see what happens when row numbers increase to
large numbers, but I have no such data.
Regards,
mk
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Arnaud Delobelle wrote:
mk writes:
[...]
hashable
..
All of Python’s immutable built-in objects are hashable, while no
mutable containers (such as lists or dictionaries) are.
Well ok, hashable they're not; but apparently at least dict and list
have id()?
lists and dicts are not has
ext day it had brought up
about two thirds of the initial VM loader screen ...
You tell these young kids, and they just don't believe you!
For the uncouth yobs, err, culturally-challenged:
http://www.youtube.com/watch?v=Xe1a1wHxTyo
(Four Yorkshiremen)
Regards,
mk
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ey] = line
sortedlines = []
keys = linedict.keys()
keys.sort()
for key in keys:
sortedlines.append(linedict[key])
return sortedlines
if __name__ == '__main__':
sortit('testfile.txt')
MRAB's solution is obviously better, provided you know ab
a lot: allocating
key in a dict, then sorting dict's keys, then iterating over keys and
accessing dict value.
Regards,
mk
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inted
out, the *type* of bultins is hashable.
Regards,
mk
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Bruno Desthuilliers wrote:
mk a écrit :
Obviously, don't try this on low-memory machine:
a={}
for i in range(1000):
Note that in Python 2, this will build a list of 1000 int objects.
You may want to use xrange instead...
Huh? I was under impression that some time after 2.0
languages for
OODBMS. Sadly, I have not had time to get & read those sources.
Regards,
mk
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ng some query in "low-level" SQL, as I
have done a few times, it's still easy to make SQLAlchemy slurp the
result into objects provided you ensure there are all of the necessary
columns in the query result)
Regards,
mk
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ss that in a purely imaginary example, you could also combine two
databases? Say, a tweet bigtable db contains tweet, but with column of
classical customer_id key that is also a key in traditional RDBMS
referencing particular customer?
Regards,
mk
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({k:interm[k]})
return finlist
if __name__ == "__main__":
intermediate = makeintermdict(elems)
print intermediate
finlist = makelist(intermediate)
print 'final', finlist
{'4068': ['Gi9/6'], '4069': ['Gi9/6'], '4065': ['Gi9/6', 'Po2', 'Po3',
'Po306']}
final [{'4068': ['Gi9/6']}, {'4069': ['Gi9/6']}, {'4065': ['Gi9/6',
'Po2', 'Po3', 'Po306']}]
I hope this is not your homework. :-)
Regards,
mk
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some project.
Regards,
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