On 06/09/11 16:46, ssegvic wrote:
> For the moment, I only wish to properly sort a Croatian text file
> both on Windows and Linux (I am a cautious guy, I like reachable
> goals).
> When the locale is properly set, sorting works like a charm
> with mylist.sort(key=locale.strxfrm).
The problem with
On 07/09/11 12:39, ssegvic wrote:
> On 6 ruj, 17:53, Thomas Jollans wrote:
>> On 06/09/11 16:46, ssegvic wrote:
>>
>>> For the moment, I only wish to properly sort a Croatian text file
>>> both on Windows and Linux (I am a cautious guy, I like reachable
>>&g
On 07/09/11 04:19, Littlefield, Tyler wrote:
> Hello:
> I've got a bit of time on my hands, so I'm curious what sorts of
> projects there are that people needs help with. I'd like to choose
> something that doesn't have a ton of red tape, but is stable, which is
> why I ask here instead of just Goo
On 07/09/11 20:33, Siniša Šegvić wrote:
> I expect that most of my Windows users will not care
> to configure their computers with the national locale
> (and besides, that does not seem to work, anyway).
Are, on Windows, the default system region/language setting, and the
locale, distinct? (And,
I know someone who was involved in creating a language called A+. It
was invented at Morgan Stanley where they used Sun keyboards and had
access to many symbols, so the language did have set symbols, math
symbols, logic symbols etc. Here's a keyboard map including the
language's symbols (the red ch
I`m thinking about creating a very simple revision system for photos
in python, something like bazaar, mercurial or git, but for photos.
The problem is that handling large binary files compared to plain text
files are quite different. Has anybody done something like this or
have any thoughts about
On 11 Mar, 17:23, Tim Golden wrote:
> On 11/03/2011 16:05, Chris Hulan wrote:
>
>
>
>
>
>
>
>
>
> > On Mar 11, 9:56 am, Thomas W wrote:
> >> I`m thinking about creating a very simple revision system for photos
> >> in python, something l
python -m t 3 improves Semaphore() by putting self.__cond.release() into
a finally: clause.
python -m t 4 "destroys" this beautiful new concept by throwing an
Asserion at the appropriate (worst case) place (instead of a
KeyboardInterrupt).
So the question is: Bug(report) doe to finally:,
e in python. But i'm feeling
it's too much complicated for my capability.
Cheers
Jins thomas
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hat's what he needs to do, since it wasn't very clear.
Maybe that works. But it is much, much worse than using keys...
Thomas
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On Apr 17, 8:56 pm, Chris Rebert wrote:
> On Sun, Apr 17, 2011 at 12:30 PM, Gerald Britton
>
>
>
>
>
>
>
>
>
> wrote:
> > I apologize if this has been answered before or if it is easy to find
> > in the docs. (I couldn't find it but might have missed it)
>
> > I'm trying to understand the differe
unctions
appropriately.
Thomas
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s regardless of their source IP address?
This probably is more of a Linux networking question than a Python
question, but I'm hoping somebody has solved this problem in Python.
You must set the network interface to promiscous mode on the receiving side:
os.system("ifconfig eth0
('this')
yield "first try", var1.hobgle(var2)
var3 = last_resort(var1)
yield "second try", var3.wiglat(var2)
yield "default value", "Even that did not work."
Disclaimer: Untested, but you should get the idea.
Thomas
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manager
deliberately left away, or just forgotten? It is fine to work with
"with" on a file or other closable object - why not on a generator,
without contextlib.closing()?
TIA,
Thomas
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only since 2.5.
But in these (admittedly rarely) cases, it is better practice to close
explicitly, isn't it?
Unsure,
Thomas
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robably due to the fact that this feature is needed so
rarely (although it would have been nice to have it always...).
Thanks for the answers,
Thomas
[1] Maybe in this way:
class GeneratorClosing(object):
"""Take a parameterless generator functon and make it a context
man
er.baudrate" instead of "print ser.baudrate", so that could be a
source of behavioral differences.
#import os
#program = 'C:\Program Files\Program.exe'+'-start'
#os.system(r'program)
I suppose this doesn't belong to the problem?
Thomas
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Am 10.04.2011 18:21, schrieb Mel:
Chris Angelico wrote:
Who would use keyword arguments with a function that takes only one arg
anyway?
It's hard to imagine. Maybe somebody trying to generalize function calls
(trying to interpret some other language using a python program?)
# e.g. input win
k2=v2).
Then you cannot set the key clobberexistingvalues to False via the
update method any longer...
Thomas
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se setBaudrate() instead of close() and
creating a new connection?
I can't see why it should make a difference, but I as well can't see why
your approach is not working, especially as it works if you do it
manually...
Maybe your target device expects to get something signalled via the
0?
Ah. That's what I really wanted. Thanks a lot. I wonder why that
was not mentioned in the tutorial I used ...
Generally, it seems better to use '' instead of '0.0.0.0' in this case
in order to stay compatible with other address families, especially INET6.
Thomas
--
r will be kept for a
certain time on order not to kill any existing connections.
Thomas
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Am 25.04.2011 16:29, schrieb Thomas Rachel:
or maybe even better (taking care for closures):
function = bool
value = 'the well at the end of the world'
## ...
actions.append(lambda val=value: function(val))
## ...
for function in actions:
results.append(function())
Or yet even bett
Am 26.04.2011 14:21, schrieb Thomas Rachel:
Especially look at the concepts called "borrowed reference" vs. "owned
reference".
http://docs.python.org/extending/extending.html#reference-counting-in-python
will be quite helpful.
Thomas
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uot;, outdata);
free(outdata);
return ret;
}
BTW: Is there any reason for using calloc()? malloc() would probably be
faster...
Thomas
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looks like following
[DB_INFO]
server = "server"
database = "database"
user = "user"
password = "password"
I think if you will have seen the output above, you will probably see
what is wrong here: too many "s. :-)
HTH & HAND!
Thomas
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got it, but don't need it, we do Py_(X)DECREF().
BTW: Is there any reason for using calloc()? malloc() would probably
be faster...
may be, I didn't measure it ever... but calloc() gives clear
space... :)
Ok. (But as sizeof(char) is, by C standard definition, always 1, you can
write it
t ask this,
because I don't set errstring with PyErr_SetString, but I get
TypeError - how does Python knows, this error raised?
There is magic inside... :-)
Thomas
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his way, you can easily change from 2.0 you
are working on to 1.5 requested by the customer.
Thomas
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Am 26.04.2011 20:42, schrieb Algis Kabaila:
Thomas, have you tried bzr (Bazaar) and if so do you consider hg
(Mercurial) better?
I have played around with bzr, but afterwards more with hg which gave me
a better beeling (don't know why)...
Thomas
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y not? It might depend on some settings you set (keepalive
etc.); but generally you should get an exception when trying a
communication over a disconnected connection (over a disconnection? ;-))
When going over tne network, aviod pickling. Better use an own protocol.
Thomas
--
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one instance internally, it is not
possible any longer to unload the module without a memory leak...
As already stated - you might want to have a look at some other C
modules and mimic their behaviour... (and hope they are doing it right...)
Thomas
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Am 27.04.2011 13:17, schrieb Jean-Michel Pichavant:
You're mistaking, SVN is not restricted to solo work. However it's more
suitable for solo work than git.
Why?
I personally found hg much better than svn. That's why I migrated all my
projects.
Thomas
--
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ts etc.), and can re-use them if necessary, in order to
prepend/append data.
Closing can happen additionally, if the user wants.
Thomas
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max:
yield a
a, b = b, a+b
def fib(max=None, num=None):
if num is None:
return list(fibgen(max=max))
else:
from itertools import islice
return list(islice(fib(max=max), num))
Thomas
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calls fib() twice, and each of
those calls fib() twice, and you get the point...
yes - but they are called one after the other, so the "twice" call
counts only for execution speed, not for recursion depth.
Thomas
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= random.SystemRandom()
else:
randobj = random.Random()
and then use
from myrandom import randobj as random
and then use random's methods (randrange, random, whatever), no matter
where they come from.
Thomas
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ch :)
Understandable. That's that the printf debugging of the refcounts can be
good for - even if you don't really have a problem.
Thomas
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On May 6, 7:36 am, Jabba Laci wrote:
> Hi,
>
> If I want to check if a list is empty, which is the more pythonic way?
>
> li = []
>
> (1) if len(li) == 0:
> ...
> or
> (2) if not li:
> ...
>
> Thanks,
>
> Laszlo
I prefer (1), it feels more explicit about what I'm testing. The fact
that empty sequ
first(myDict.items())
... and get a StopIteration if the dict is empty.
If you do
def first(x, default=None):
for i in x:
return i
return default
you might have an alternative approach to do so.
Thomas
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On May 9, 9:52 pm, Andrew Berg wrote:
> I need to find whether a given file is 32-bit or 64-bit (and raise an
> exception if the file doesn't exist or isn't an executable file). I
> thought platform.architecture() would do this, but it returns ('64bit',
> '') no matter what value I assign to the e
n loops are compiled into python, therfore they are the
fastest.
Which loops do you mean here?
Thomas
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('mainWindow', 'window'),
('menuitem_output_on', 'outputToggleMenu'),
('button_toggle_output', 'outputToggleButton'),
('textview_log', 'logView'),
('scrolledwindow_log', 'logScrollWindow'),
)
for name, selfname in assignmap:
val = widgetDic[name] = self.wTree.get_widget(name)
setattr(self, selfname, val)
HTH,
Thomas
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false.
Right. And not only that: Python objects resp. classes not claiming to
have a truth value (__nonzero__), but a length (__len__) are judged by
that concerning their truth value: iff the length is 0, their truth
value is False.
Thomas
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File "", line 1, in
OverflowError: long int too large to convert to int
>>> ctypes.FormatError(0x80040005 - (2**32-1))
'Kein Cache zum Verarbeiten vorhanden.'
>>>
Thomas
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nt(item)
is valid syntax in every version of Python from 1.5 to 3.2, and it does
the same thing in all of them.
C and C++ guys complain if these languages are intermixed. Even there it
is possible to write a program which is valid in both of them.
Nevertheless, they are two different languages.
l, not Python.
ACK.
Thomas
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ly it would have been possible to do otherwise, but then it would be
a different language. Objects can be mutable, period.
In MATLAB, e.g., you have what you desire here: you always have to pass
your object around and get another ne back, even if you just add or
remove a field of a struct or change the value of a field.
HTH,
Thomas
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)(i))
...
gs[0](0)
0
There is a simpler way: with
>>>> fs = []
>>>> for i in range(4):
> ...fs.append(lambda n, i=i: i + n)
> ...
you give each lambda a different default argument.
>>>> fs[0](0)
> 0
Thomas
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the screen grab it proceeds and simply hangs
>
> at " pre version"??
>
> I will appreciate any help.
>
> Than you,
>
> Venkat
>
>
>
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
>
>
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f you start "python" from the terminal, rather than
using IDLE? If not, is there an error message?
- If python (in the terminal) hangs, and you press Ctrl+C, what happens?
- If you start idle from the terminal and do what you've been doing so
far, are there any error messages?
-
e can help you do this.
https://docs.python.org/3/library/runpy.html
However, as others have hinted, if you want to run bits of Python from
Python, then it's probably better to use functions.
-- Thomas
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link python not
> with the system glibc but with my custom glibc?
>
> Cheers,
> Daniel
>
>
>
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d never do.
>
> Yes, my PYTHONPATH looks like:
> C:\Users\me\AppData\Local\Programs\Python\Python36-32
> C:\Users\me\AppData\Local\Programs\Python\Python36-32\DLLs
> C:\Users\me\AppData\Local\Programs\Python\Python36-32\Lib
>
> Should I remove them? I suppose installer did s
you've redefined "object", these are the same.
Python 2 had, for historical reasons, a distinction between "old-style"
and "new-style" classes. It normally doesn't matter much, but explicitly
inheriting from object makes a class new-style.
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huts down?
>
> Also, what happens if it tries to print after the interpreter shuts down?
> Where
> does output go?
On Linux, I think it would go to the same virtual terminal as it did
before, if that still exists. (Otherwise, to /dev/null). This is how
processes that started out at
, in this case,
makes your code far more elegant: a formatted string literal
<https://docs.python.org/3/reference/lexical_analysis.html#f-strings>
alert = (f"Today's forecast for {city}: The temperature will range from
{low_temperature} "
f" to {high_temperature}{temperature_unit} Conditions will be
{weather_conditions}")
-- Thomas
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g any time soon (certainly not before RHEL
includes python3 by default.
>
> Regards,
>
> INADA Naoki
>
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eries of memory-mapped files to pass the
data without pickling, or, if your code is only going to run on Unix,
something involving shared memory through multiprocessing.Array.
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On 12/09/17 10:21, gerlando.fala...@gmail.com wrote:
> Il giorno lunedì 11 settembre 2017 12:19:27 UTC+2, Thomas Jollans ha scritto:
>> On 2017-09-10 23:05, iurly wrote:
>>> As far as I'm concerned, I'm probably better off using double buffers to
>>> avoid
users who don't make as
much effort to find a solution. I can't say I understand the ins and
outs of installing things on Windows... is there anything that can be done?
Best,
Thomas
> I have tried repeatedly to install various Python versions (32-bit or
> 64-bit), but the sa
all seeing them go into paroxysms of gender confusion when Prince
>> Charles,
>> Duke of Edinburgh, appears in public wearing a kilt.
>>
> You do know that Prince Charles is the Prince of Wales and that the Duke
> of Edinburgh is his father, don't you? :-)
Big differenc
ld" at the machine in a menacing, regal voice. if it yields,
it is Python 2.3 or newer.
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On 2017-09-13 14:33, leam hall wrote:
> On Wed, Sep 13, 2017 at 8:28 AM, Stefan Ram wrote:
>
>> I presume that "tkinter" is intended to be pronounced
>> "logically":
>>
>> T K inter (tee kay inter /ti keI In t%/)
>>
>> . But it would be faster to pronounce it
>>
>> T kinter (tee kinter /ti
s
> question of the community. What would you consider the top (<= 5) core
> values?
>>> import this
>
> Regards
>
>
> Darin
>
> [1] http://www.nodesummit.com/videos/?the-video-node2017=45
>
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On 2017-09-13 16:47, Rick Johnson wrote:
> leam hall wrote:
> {TEE-KAY-ENTER}
enter? not inter?
--
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s_, and that's what really matters
> here, a print function is always three more keystrokes than
> a print statement.
Or perhaps, in analogy to playing a guitar, a keystroke can involve
multiple (partially or practically simultaneous) keypresses. In which
case, no.
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t;>> print 1
File "", line 1
print 1
^
SyntaxError: Missing parentheses in call to 'print'
>>> exec 'print 1'
File "", line 1
exec 'print 1'
^
SyntaxError: Missing parentheses in call to 'exec'
g in the US. There you are, adding up the prices on
the products you pick up, figuring out (approximately) how much you'll
owe, you go to pay, and the next thing you know there's some unspecified
(!) markup added to the price.
D'Arcy, I'm with the cashier. You're clearly
; + FullyQualifiedErrorId : CommandNotFoundException
>>
>>
>> I'm very new so honestly have no idea what the issue may be, but from
>> previously trying to use python I think it may have something to do with
>> configuring windows environment variables? Not sure, but just something
>> I've ran into in the past previous times trying to learn python for more
>> data analysis purposes.
>>
>> Any help would be greatly appreciated!
>>
>> Thanks a lot,
>>
>> Joey Steward
>>
>
>
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)?
It looks to me like the root cause of the problem was that they copied
the code from a web page, and the web page contained invalid JSON.
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On 2017-09-19 20:21, Stefan Ram wrote:
> I do not use UTF-8
>
Why on earth not?!
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ion.
py> a_list = []
py> a_list += 1,2,3
py> a_list
[1, 2, 3]
py> a_list.append(4)
py> a_list
[1, 2, 3, 4]
py> a_list += 4
Traceback (most recent call last):
File "", line 1, in
TypeError: 'int' object is not iterable
py> a_list.append((5,6,7))
py> a_list
[1, 2, 3, 4, (5, 6, 7)]
py>
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On 2017-09-21 12:38, Sayth Renshaw wrote:
> Thanks Thomas yes you are right with append. I have tried it but just can't
> get it yet as append takes only 1 argument and I wish to give it 3.
>
> I am really having trouble creating the groups of 3, since I am getting one
> c
with pass be good or are there easier ways ) ,
>
>
> try:
> Z_block = block.data.data.di_data.data[0][0]except AttributeError as e:
>
> pass
try:
return self.some.attribute.or.another
except AttributeError:
return DEFAULT_VALUE
is a perfectly good patte
> nan > 0
False
>>> nan == 0
False
>>> not(nan > 0)
True
>>> cmp(nan, 0)
-1
>>> cmp(0, nan)
1
Of course I see why the behavior of NaN is hard to swallow: in a sense
the logical thing to do would be to raise a ValueError (or TypeError)
when comparing to NaN - seeing as the operation doesn't make much sense
in the first place - but it's better to not have an edge case where
comparing two floats can raise, but only under very unusual circumstances.
Cheers,
Thomas
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Maybe this would be considered a bug by lxml. Maybe it won't.
http://lxml.de/ links to a bug tracker and a mailing list.
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>
> NAN != x
>
> return True.
Just to make the implication explicit:
>>> from math import nan
>>> nan is nan
True
>>> nan == nan
False
>>> nan != nan
True
>>>
--
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On 26/09/17 00:49, Stefan Ram wrote:
> |>>> from random import randint
> |
> |>>> randint
> |>
> |
> |>>> randint.__self__
> |
> |
> |>>> randint( 2, 3 )
> |2
>
> It seems I am calling the method »randint« of the object at
> »0x389798«, but I do not have to write the object into the
> call!?
On 25/09/17 18:44, john polo wrote:
> Python List,
>
> I am trying to make practice data for plotting purposes. I am using
> Python 3.6. The instructions I have are
>
> import matplotlib.pyplot as plt
> import math
> import numpy as np
> t = np.arange(0, 2.5, 0.1)
> y1 = map(math.sin, math.pi*t)
I
On 26/09/17 01:04, Thomas Jollans wrote:
>
> In [1]: class C:
>
>...: def m(self):
>
>...: return True
I'll have to give my MUA a stern talking to about the importance of
whitespace. Anyway, you know what I mean.
>
>...:
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ade soon.
The differences between PyQt4 and PyQt5 aren't massive, but they've
moved around some classes (QtGui has been split into two packages, which
is going to be annoying to migrate) and support for old-style signal and
slot syntax has been dropped (good riddance).
Also, if you're using Python 2: don't. Just don't. It's not 2012 any
more. (I don't know what you're using, but /usr/bin/python is normally
Python 2)
>
> so the button is the central widget. To use the Label, I think I would have
> to create a composite widget which is too complicated for me, currently.
>
> Now. it works so I tested some more and added:
> def popup_dialog(self):
> x = Dialog(self)
> y = Dialog(self)
> y.show()
> if x.exec_():
> print(x.spn.value())
> AND
>
> class Dialog(QDialog):
> self.connect(self.cncl_btn, SIGNAL('clicked()'), self.close)
>
> So my dialog pops up and because exec_ is being called on 'x', I have to
> first close that widget before I can interact with my button and 'y'.
> However, let's say I close the 'x' dialog - then I can click on 'Button' and
> I get two more dialogs which don't lock anything - why??
>
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x27;')
> as conn:
> print(conn)
You may have messed up some quotes there.
> ---
> Thanks,
> Bernie.
>
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On 2017-09-26 16:41, Veek M wrote:
> Thanks - i'm on debian stretch so python 2.7 is what I use.
https://packages.debian.org/stretch/python3
https://packages.debian.org/stretch/python3-pyqt4
https://packages.debian.org/stretch/python3-pyqt5
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On 26/09/17 20:47, Irmen de Jong wrote:
> Hi,
> I've been using Python's executable zip application feature to neatly
> package my little game into a single "executable" file.
> Here "executable" means the user can simply start it by doubleclicking
> it, or launching it from a shell prompt. Of cour
On 27/09/17 00:23, Cai Gengyang wrote:
> I'm trying to understand the logic behind AND. I looked up Python logic tables
>
> False and False gives False
> False and True gives False
> True and False gives False
> True and True gives True.
>
> So does that mean that the way 'and' works in Python is t
my preferred tool, the Anaconda plugin for
Sublime Text, sometime gets PEP 8 operator spacing wrong, and complains
operators without spaces even where PEP8 explicitly recommends not using
spaces. Read PEP 8, follow it if possible, but use your best judgement.
Readability is important, blindly
"", line 1
import (os, sys)
^
SyntaxError: invalid syntax
>>> from os import (listdir, chdir)
>>> listdir, chdir
(, )
>>>
Of course the reasons the second syntax was eventually added to the
language don't apply in the first case, but this does look a bit
inconsistent...
-- Thomas
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On 2017-09-27 13:51, Matt Wheeler wrote:
> With deepest apologies to all involved...
>
> On Tue, 26 Sep 2017 at 08:42 Gregory Ewing
> wrote:
>
>> Ben Bacarisse wrote:
>>> Think functional! This is 257 characters:
>>
>> 250 chars, 17 shorter than the text it produces:
>>
>> a=[];o=[];n=[];A=list
On 2017-09-27 16:38, Matt Wheeler wrote:
> On Wed, 27 Sep 2017 at 13:58 Thomas Jollans wrote:
>
>>> Reproducing the original string exactly the best I've managed is 260:
>>>
>>> t,f,a,o,n='True','False','and','or',
On 2017-09-29 08:58, Frank Millman wrote:
>
> It confirms that the problem was there in 3.5, but is fixed in 3.6.
>
Same on Linux: 3.5 has the bug, 3.6 doesn't.
(Python 3.5 from Red Hat, 3.6 from Anaconda)
--
Thomas Jollans
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ber to clear a drain would be
> kinda like hiring a whiz-bang C programmer to configure your
> email server--it isn't that he or she *can't* do it...
>
You mean like Tuppy Glossop's Plumbo-Jumbo, I assume?
https://www.flickr.com/photos/leff/7746149
--
Thomas Jollans
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ndows. For binary I/O,
it doesn't. (This means that it's important to specify text or binary
mode in your calls to open() if you want your code to be portable).
\r\n is not translated to \n on Unix. So, if you want your code to do
the right thing, use \n.
-- Thomas
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On 29/09/17 19:06, Steve D'Aprano wrote:
> In the standard library's contextlib.py module, there is a class for
> redirecting
> standard I/O streams, and two public functions. The code is short enough to
> reproduce here:
>
> # From Python 3.5
>
> class _RedirectStream:
> _stream = None
>
cases, it looks like the delay is always before the message is
received (i.e., accepted) by mail.python.org. This looks like greylisting.
I have no idea why messages "from" regular list users coming through
large, reputable ISPs would be regularly greylisted, but I suppose what
will b
On 01/10/17 03:52, Stefan Ram wrote:
> MRAB writes:
>> raise ValueError("Temperature below -273 is not possible")
> -273.15
>
Either way, that depends.
https://en.wikipedia.org/wiki/Negative_temperature#Examples
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27;"
>>> print(s)
two
lines
>>> print(repr(s))
'two\nlines'
>>>
> Hat jemand eine Idee?
Im Prinzip würde ich in so einem Fall eifach empfehlen, alle
Zeilenumbrüche, egal wie sie aussehen, pauschal zu ersetzen:
s.replace('\r\n', '\n')
--
Thomas Jollans
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at endpoints
> they handle, for instance.
The point is that there are plenty of useful decorators that have
nothing to do with dunder methods.
--
Thomas Jollans
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On 03/10/17 20:05, Dennis Lee Bieber wrote:
>
> while True:
> x = input("Enter a number (blank to exit) => ")
> if x:
> try:
> ix = int(x)
> print("Square = %s" % (ix * ix) ) #why invoke
> exponential
> except chec
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