There is a built-in identity function in Python. The function is called
'id'. See https://docs.python.org/3/library/functions.html#id Note that
this will not behave the same across different Python runtimes. e.g.
CPython, IronPython or Jython all implement this differently.
An example:
Python 3.5
Note that this issue is mentioned in the pymssql FAQ:
http://pymssql.org/en/stable/faq.html#pymssql-does-not-unserialize-date-and-time-columns-to-datetime-date-and-datetime-time-instances
Regards,
Nathan
On Mon, Sep 12, 2016 at 8:29 PM, Dennis Lee Bieber
wrote:
> On Tue, 13 Sep 2016 00:52:59 +0
The grammar and what it represents is defined at
https://docs.python.org/3/reference/expressions.html#expression-lists
Regards
On Sep 16, 2016 9:59 PM, "Peng Yu" wrote:
> OK. But it is documented somewhere in python doc?
>
> On Fri, Sep 16, 2016 at 9:48 PM, Lawrence D’Oliveiro
> wrote:
> > On
On Mon, Sep 26, 2016 at 6:00 PM, MRAB wrote:
> On 2016-09-26 23:03, M2 wrote:
>
>> Hello
>> The program is designed to collect different statistics from servers
>> across the network and populate in excel sheet.
>> Library : xlsxwriter.0.9.3
>>
>> Below is the Snip of code being used
>> #! /usr/b
Mohan Mohta wrote:
> > > On Monday, September 26, 2016 at 6:56:20 PM UTC-5, Nathan Ernst wrote:
> > >> On Mon, Sep 26, 2016 at 6:00 PM, MRAB
> wrote:
> > >>
> > >> > On 2016-09-26 23:03, M2 wrote:
> > >> >
> > >> >&g
No, because you've not provided anything resembling a question or a
problem. Please provide a minimal example set of code that exposes the
problem you are encountering, and describe the problem you are having. And
note that we will not write code for you if it ends up looking like a
homework proble
In regards to performance of Lua vs Python, I don't have enough (near zero
experience) with Lua to comment there.
But in regards to embedding in a game, the only experience I have w/ Python
being embedded is while working on modding Civilization IV. What I saw
there just made me nauseous.
The rea
I would also toss in there: never name a script test.py. Causes nothing but
trouble, at least in python2.
On Nov 17, 2016 8:01 PM, wrote:
> Steven D'Aprano at 2016/11/17 4:04:04PM wrote:
> > The most important thing you should learn from this thread is:
> >
> > - avoid using "from module import
I'm using Python 3.5.2, and the following code (when invoked) causes a
PendingDeprecationWarning when used in a unit test:
def identity(x):
return x
def adjacent_difference(seq, selector=identity):
i = iter(seq)
l = selector(next(i))
while True:
r = selector(next(i))
yield r - l
(i))
yield r - l
l = r
except StopIteration:
return
On Tue, Nov 22, 2016 at 9:02 PM, MRAB wrote:
> On 2016-11-23 02:50, Nathan Ernst wrote:
>
>> I'm using Python 3.5.2, and the following code (when invoked) causes a
>> PendingDeprecationWarning w
Thanks, ChrisA
On Tue, Nov 22, 2016 at 9:24 PM, Chris Angelico wrote:
> On Wed, Nov 23, 2016 at 2:14 PM, Nathan Ernst
> wrote:
> > I was not aware of that PEP.
> >
> > The logic in my function is exactly as desired, so to squelch the
> warning,
> > I mere
I don't see anything in that output resembling an error, just a few
warnings that some features may no be available.
Have you tried importing pygame after you did that? That's what'll prove
one way or another that it worked.
Regards,
Nate
On Wed, Nov 23, 2016 at 10:48 PM, Cai Gengyang
wrote:
>
You're attempting to print out control characters most of which have no
visible representation. For "\7", at least if you're running from bash, and
not in an IDE, you should get an audible bell. All decimal ordinals below
32 are control
You can find a list of the symbols here:
http://en.cppreferen
Sure, what if the input used a double quote instead of single, cursory
glance looks like it might vulnerable.
(Not trying to be argumentative here)
On Nov 26, 2016 7:21 PM, "Steve D'Aprano"
wrote:
> On Sun, 27 Nov 2016 11:25 am, Chris Angelico wrote:
>
> > On Sun, Nov 27, 2016 at 11:13 AM, Stev
You're right. Didn't look closely enough at it in my phone. Still don't
think i'd recommend this in a general solution, though. You effectively
have to white-list code snippets. Not very useful.
On Nov 26, 2016 7:51 PM, "Michael Torrie" wrote:
> On 11/26/
To be fair, in other languages, such as C# or C++ with similar mechanisms,
if you don't ask for the result from an async or future task, there's no
guarantee the async task will be executed at all unless (or until) you ask
for the result. C++'s futures even give an explicit flag indicating you
want
Rather than argue about what is/should be allowed by a filesystem, this
defines what is allowed on NTFS (default for modern Windows systems):
https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx
One can complain about whether or not something should be allowed, but,
you'
Ifyou're running on Windows 10, at least, you can soon purge that memory.
command.com doesn't exist (may never have existed on Win2k, XP, Vista, 7,
8, 8.1 or 10). If I try and run either "command" or "command.com" from
Win10, both say command cannot be found.
IIRC, command.com was a relic of Win9x
OT, but I'm curious, do they explain *why* it's wrong and give an
alternative, or just outright deride it as "the wrong way". I ask because
I've read similar complaints about the community around systemd, but as it
rarely affects me personally, I've never bothered to care.
On Mon, Dec 5, 2016 at 8
One other consideration in regards to globbing in the argument list:
there's a static limit to the byte length of argv. On windows, it's 8191
bytes (I'm assuming a null-terminator brings that to 8192, which is a weird
2**13). For Linux, as of kernal 2.6.25, apparently, the limit is 131072
bytes, an
With a case-sensitive file system, how do you search only for 'harry', not
knowing what combinations of upper and lower case have been used? (It's a
good thing Google search isn't case sensitive!)
On Linux, I'd do "find . -iname harry". A lot, but not all, of the tools
usually have options to igno
Have you looked into Visual Studio Code (https://code.visualstudio.com/)?
I've not used it extensively, and only on Windows, but it's an open source
IDE originated by MS that purportedly works on Windows, Linux & OS X.
It does have pretty decent Python support (haven't tried debugging, but
syntax
I used to manually reformat unfamiliar C++ by hand, if for no other reason
in that it forced me to read the code and somewhat comprehend what was
going on. Now, I've lost my patience and use clang-format, a great & highly
configurable tool. I also use vim for Python & C++ coding, so I also rely
upo
I mostly agree with this
On Mon, Jan 30, 2017 at 7:18 PM, Joseph L. Casale wrote:
> > C# hardly seems any better than Java to me as far as a language goes.
>
> Which sounds pretty good to me, they are both high performance, mature
> and rich languages.
>
> > Being forced into working with classe
One other thing besides the issues noted with filename - newline is set to
a space. It should be set to an empty string.
See: https://docs.python.org/3/library/csv.html#id3
Regards,
Nate
On Wed, Feb 22, 2017 at 3:52 PM, wrote:
> On Wednesday, February 22, 2017 at 5:55:47 PM UTC, Braxton Alfred
My issue with using spaces instead of tabs, is that, as mentioned earlier
in the thread, everyone has their own preferences on indentation. I've
worked on teams where different developers used 2, 3 & 4 spaces as
indentation. Obviously, if you're using spaces, several of the members will
be unhappy.
I don't generally align stuff, either, but if you're going to, use spaces.
On Sat, Mar 18, 2017 at 4:55 PM, Chris Angelico wrote:
> On Sun, Mar 19, 2017 at 8:50 AM, Nathan Ernst
> wrote:
> > My rule of thumb: tabs for indentation, spaces for alignment (i.e. trying
> &g
On Sat, Mar 18, 2017 at 4:44 PM, ROGER GRAYDON CHRISTMAN
wrote:
> Just a couple minor notes from my experience:
>
> 1)
> Some of the course management software I use doesn't like me typing tab
> characters.
> When I want to post sample code into a course page using this software,
> tabs
> are eit
I want a tab to be inserted, by default. If I
want something else, I'll change the configuration.
On Sat, Mar 18, 2017 at 6:38 PM, Marko Rauhamaa wrote:
> Nathan Ernst :
>
> > Tabs rectify this issue as you can configure them to appear how you
> > like to see your code wi
I would also add a link to the dependency's project page, in case building
from source is necessary.
You don't always have root, and you're not always building with the system
supplied compiler.
There are a lot of situations that may require building from source. Far
too many to even bother to en
I was a bit surprised when I looked at the language reference for 3.6.x. I
expected there'd be a direct link to comprehensions, but there's not.
You have to know what you're looking for:
6.2.5: List Displays
6.2.6: Set Displays
6.2.7: Dictionary Displays
And, then, click on the appropriate eleme
Hi Pauline,
It depends largely on whether you want to (and have sufficient permissions)
to install for all users or just yourself.
If, on *nix, you're installing site-wide (for all users), typically you'd
do: "sudo pip install " (for python 2) or "sudo pip3 install
" (for python 3). If you're in
If you've installed into Program Files, then you're on Windows, and you've
installed for all users. Start a command prompt by right-clicking on the
start icon, then selecting "Command Prompt (Admin)". This should work on
Windows 8.x and Windows 10. Windows 7, you may need to navigate through
Progra
Hi Pauline,
I was able to infer you're on Windows, but not which version. Try
right-clicking on the start menu to start a command prompt as an
administrator (I'm not sure that was available in Windows 7, and I don't
have access to a Win7 box currently to verify). Failing that, you should be
able t
ke a web request, parse JSON or
XML, handle datetimes).
Remember: Python comes with batteries included.
-Nate
On Mon, Apr 3, 2017 at 5:09 PM, Deborah Swanson
wrote:
> Nathan Ernst wrote, on April 03, 2017 1:59 PM
> >
> > I was a bit surprised when I looked at the language refer
I used to write Python modules in C++. Well, more accurately, wrapped
already-written C++ APIs to expose to Python using Boost Python. This
wasn't due to performance issues, but to avoid reimplementing APIs.
That said, I believe Python gets a bad wrap in regards to performance for a
variety of re
goto is a misunderstood and much misaligned creature. It is a very useful
feature, but like nearly any programming construct can be abused.
Constructs like 'break', 'continue' or 'next' in languages like Python or
C/C++ are goto's with implied labels.
As Mikhail said, goto's can be great to break
I think that's fair (and I had intended to mention it). Although, I'm
curious how threading with IO compares to using async/awai (I've not
experience with async/await in Python, just in C#).
Regards,
Nate
On Tue, Apr 11, 2017 at 8:04 PM, MRAB wrote:
> On 2017-04-12 01:28,
Thank you for that Alan Kay quote. Brightened up my day. Since you also
mentioned COBOL, and this is a thread about "goto", reminded me of the
single most abhorrent thing I ever saw in COBOL (I had to convert a single
COBOL batch process to ASP.Net as an intern back in 2003-4). "MOVE NEXT
SENTENCE"
Off topic, but I find it a little annoying that the default Windows
installer links to the 32-bit installer (and there's no adjacent 64-bit
installer link) - you have to dive into various links to get the 64-bit
installer. Seeing as 64-bit Windows is now the norm, it should be the
default. (It is p
I've likewise mostly been ignoring this thread as it has gotten out of
control.
At a few jobs ago, I was nearly daily involved with interviewing
candidates. Initially, I was point on "culture fit". i.e. how would the
potential employee react to having a phone thrown at them (it happened - I
worked
As previously asked: what board are you using? There might be a simple
response to your issue, but you've yet to state the board you're using. You
will not get any useful responses until you answer this very, very simple
question.
If you can't "pip install", you'll probably have to build from sour
I've used bbfreeze on linux, but that's been ~8 years ago. Don't know about
the current state of the project.
Regards,
Nate
On Tue, May 9, 2017 at 9:42 PM, MrJean1 wrote:
>
> > Is there any way to pack my .py with all required libraries and create a
> self running package? Something like buildi
Deborah,
I get the feeling you don't understand the architecture/implementation of
Python. The (C)Python interpreter is written in C. A number of the built-in
modules are least partially written in C. As such, C is a natural
integration point for extensions. Many, many third-party extensions are
There is another way to do it, but it's not pretty, and I don't recommend
it:
>>> class Foo:
... pass
...
>>> from functools import partial
>>> f = Foo()
>>> def hello(self, arg):
... print("hello", arg)
...
>>> f.hello = partial(hello, f)
>>> f.hello("world")
hello world
This basically re
MS used to, I'm not sure if they still do, provide a separate C++ SDK that
included the compiler, but not the full IDE. It was still quite a large
download at ~128MB. But, it included only the command-line compiler, linker
& std lib.
Starting with VS2017, the ABI is supposedly stable going foward
Not sure if this is the cause of your error, but the value for the variable
"user" is misspelled according to the preceding comment. "admim" vs "admin"
(not the M instead of an N at the end).
Regards,
Nathan
On Wed, Jun 28, 2017 at 3:08 PM, Ken R. Lewis
wrote:
> Hello!
>
> I am running a script
In Python, "==" is not a reference equality operator (and I hate Java for
their misuse of the operator), so I absolutely disagree with using the Java
description to describe Python's "==" operator, primarily because, well,
it's wrong. Simple example:
With Python 3.5.2 (should hold for any version
You'd be better off using the builtin "isinstance" function, e.g.:
isinstance(x, int). This also has the added benefit of working nicely with
inheritance (isinstance returns true if the actual type is derived from the
classinfo passed as the second argument). See
https://docs.python.org/3/library/f
gt;>> n = 4000; m = 4000; n is m
True
>>> n = 4000
>>> m = 4000
>>> n is m
False
>>>
On Fri, Jul 7, 2017 at 2:29 AM, Dan Wissme wrote:
> Le 06/07/2017 à 20:56, Nathan Ernst a écrit :
>
>> In Python, "==" is not a reference equal
Check your user folder. For me, on my PC, python is installed
at C:\Users\nernst\AppData\Local\Programs\Python
Regards,
Nate
On Fri, Jul 21, 2017 at 9:24 AM, Brian Case wrote:
> I am running windows 10 version 1703 as administrator on a Dell Inspiron
> 15 laptop.
>
> I downloaded and installed
You passed a string to "math.floor", not anything resembling a numeric
type. Try using an actual float, int or Decimal:
Python 3.5.2 (default, Nov 17 2016, 17:05:23)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from math import floor
>>>
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