On 10.01.2018 0:54, Barry Warsaw wrote:
Steve Barnes wrote:
Currently invoking `python -c "some;separated;set of commands;"` will,
if you need to use any library functions, require one or more import
somelib; sections in the execution string. This results in rather
complex "one liners".
On the
First of all, many thanks for such a excellently writen letter. It was a
real pleasure to read.
On 10.01.2018 0:15, Rob Speer wrote:
Hi! I joined this list because I'm interested in filling a gap in
Python's standard library, relating to text encodings.
There is an encoding with no name of it
On 09.01.2018 23:31, Barry Scott wrote:
I not a user of distutils or setuptools but some googling seems to say
that
the build command has a --debug to do what you want. If that does not
work it would seem like you could ask the setuptools maintainers how to
do the reason thing of a debug build.
On 09.01.2018 21:35, Ivan Pozdeev via Python-ideas wrote:
On 08.01.2018 0:11, Steve Dower wrote:
It’s not a good idea. You end up with two different C runtimes in
memory that cannot communicate, and many things will not work properly.
If you compile your debug build extension with the non
ls and binaries. You can use a
proper debug build against the debug binaries (python_d.exe).
Cheers,
Steve
Top-posted from my Windows phone
*From: *Ivan Pozdeev via Python-ideas <mailto:python-ideas@python.org>
*Sent: *Saturday, December 30, 2017 13:01
*To: *python-ideas@python.org <mailto:
On 07.01.2018 22:32, Christian Tismer wrote:
Hi Chris,
On 07.01.18 18:18, Chris Angelico wrote:
Redirecting this part of the conversation to python-ideas.
On Mon, Jan 8, 2018 at 3:17 AM, Christian Tismer wrote:
As a side note: In most cases where shell=True is found, people
seem to need eval
The Windows version of pyconfig.h has the following construct:
if defined(_DEBUG)
pragma comment(lib,"python37_d.lib")
elif defined(Py_LIMITED_API)
pragma comment(lib,"python3.lib")
else
pragma comment(lib,"python37.lib")
endif /* _DEBUG */
which
On 17.12.2017 22:20, Serhiy Storchaka wrote:
Currently repr of doesn't contain much of information besides that it
is a lambda.
>>> lambda x: x**2
at 0x7f3479b74488>
All lambdas have the same repr, different only by unreadable
hexadecimal address.
What if include the signature and the expr
On 01.12.2017 1:19, Greg Ewing wrote:
Ivan Pozdeev via Python-ideas wrote:
I needed to hold an external function reference in an object instance
(if I assigned it to an attribute, it was converted into an instance
method).
No, that only happens to functions stored in *class* attributes
On 29.11.2017 9:08, Steven D'Aprano wrote:
On Tue, Nov 28, 2017 at 12:31:06PM -0800, Raymond Hettinger wrote:
I also cc python-dev to see if anybody here is strongly in favor or against
this inclusion.
Put me down for a strong -1. The proposal would occasionally save a
few keystokes but comes
I use argparse.Namespace whenever I need this.
In reply to Chris Barker's concern of "is this code or is this data",
the last time I used it is when I needed to hold an external function
reference in an object instance (if I assigned it to an attribute, it
was converted into an instance method
On 28.11.2017 20:23, Ethan Furman wrote
On 11/28/2017 08:03 AM, Ivan Pozdeev via Python-ideas wrote:
On 28.11.2017 16:36, Nick Coghlan wrote:
it doesn't need to be a statement any more
>
Another benefit of a statement vs function is only evaluating the
error-related argume
On 28.11.2017 16:36, Nick Coghlan wrote:
On 28 November 2017 at 15:41, Steven D'Aprano wrote:
On Tue, Nov 28, 2017 at 05:12:36AM +0300, Ivan Pozdeev via Python-ideas wrote:
Unlike C, Python does the aforementioned checks all the time, i.e. it's
effectively always in "debug mod
results in two different interfaces. In normal mode, it enforces
types while in -O, accepts anything that passes the duck test.
Elazar
בתאריך יום ג׳, 28 בנוב׳ 2017, 09:12, מאת Ivan Pozdeev via Python-ideas
mailto:python-ideas@python.org>>:
On 28.11.2017 8:59, Steven D'Apran
On 28.11.2017 8:59, Steven D'Aprano wrote:
On Tue, Nov 28, 2017 at 07:35:45AM +0300, Ivan Pozdeev via Python-ideas wrote:
Actually, the way I'm using them,
assert condition, "error message", type
would probably be the most expressive way.
I disagree that is exp
On 28.11.2017 6:34, Ned Batchelder wrote:
You are proposing:
assert condition, type, value
Not specifically this, that's just an example.
Actually, the way I'm using them,
assert condition, "error message", type
would probably be the most expressive way.
Why not just use Python a
On 28.11.2017 5:19, Chris Angelico wrote:
Actually, Python does have a way of disabling assertions (the -O
flag), so they should be treated the same way they are in C.
Assertions should not be used as shorthands for "if cond: raise Exc"
in the general case.
I'm claiming, and provided evidence, t
The `assert' statment was created the same as in previous languages like
C/C++: a check to only do in debug mode, when you can't yet trust your
code to manage and pass around internal data correctly. Examples are
array bounds and object state integrity constraints.
Unlike C, Python does the af
On 08.11.2017 0:26, Paul Moore wrote:
On 7 November 2017 at 20:38, Chris Barker wrote:
On Tue, Nov 7, 2017 at 5:04 AM, Thomas Jollans wrote:
As Ivan said earlier, perhaps the Windows installers should provide a
"python3" executable, so "python3 -m pip" works everywhere.
absolutely! I really,
On 07.11.2017 23:38, Chris Barker wrote:
with ensurepip, having pip no installed in a python is getting less
common, so maybe this isn't needed anymore, but
pip is problematic in environments that have their own package manager
(i.e. anything but bare Windows) because it doesn't honor its
c
on why executables of Python proper cannot do the
same. In fact, the reason why Windows version went Py instead of this
seems to rather be to solve a completely different problem -- the
filetype association (when running a script via ShellExecute, it
autodetects which Python version to invoke).
On 07.11.2017 16:11, Paul Moore wrote:
It is, but like any such approach (Cygwin is similar, in principle if
not in execution) that makes one OS "look like" another, whether it's
appropriate is very dependent on circumstances. Training potential
Windows developers in a bash/Ubuntu style environme
On 07.11.2017 1:48, Chris Barker wrote:
On Mon, Nov 6, 2017 at 9:52 AM, Michel Desmoulin
mailto:desmoulinmic...@gmail.com>> wrote:
I know and you still:
- have to use py -m on windows, python3 linux, python in virtualenv...
can't you use python3 -m pip install .
everywhere?
You
On 06.11.2017 9:47, Michel Desmoulin wrote:
Hello,
Today I'm going to give a training in Python again.
And again it will go the same way.
On Mac I will have to make people install python, then tell them to use
pip3.
On Windows, I will have to warn them about checking the "add python
executabl
On 31.10.2017 8:37, python-ideas-requ...@python.org wrote:
On Tue, Oct 31, 2017 at 3:50 PM, Ivan Pozdeev via Python-ideas
wrote:
On 30.10.2017 17:32, Guido van Rossum wrote:
This is a key example of a case where code speaks. Can you write an
implementation of how you would want single() to
On 30.10.2017 17:32, Guido van Rossum wrote:
This is a key example of a case where code speaks. Can you write an
implementation of how you would want single() to work in Python code?
On Mon, Oct 30, 2017 at 2:49 AM, Ivan Pozdeev via Python-ideas
mailto:python-ideas@python.org>>
Generally, packages are compiled for the same processor generation as
the corresponding Python.
But not always -- e.g. NumPy opted for SSE2 even for Py2 to work around
some compiler bug
(https://github.com/numpy/numpy/issues/6428).
I was bitten by that at an old machine once and found out that t
On 30.10.2017 9:29, python-ideas-requ...@python.org wrote:
If I have understood your use-case, you have a function that returns a
list of results (or possibly an iterator, or a tuple, or some other
sequence):
print(search(haystack, needle))
# prints ['bronze needle', 'gold needle', '
The eponymous C#'s LINQ method, I found very useful in the following,
quite recurring use-case:
I need to get a specific element from a data structure that only
supports search semantics (i.e. returns a sequence/iterator of results).
For that, I specify very precise search criteria, so only tha
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