大约有 9,000 项符合查询结果(耗时:0.0313秒) [XML]

https://stackoverflow.com/ques... 

if A vs if A is not None:

... @cedbeu, Seems to depend on the value of A. I tested now python -m timeit -s"a=0" "if a: pass" "else: pass" is faster than python -m timeit -s"a=0" "if a is None: pass" "else: pass" but python -m timeit -s"a=1" "if a: pass" "else: pass" is slower. Might be platform dependant, see i...
https://stackoverflow.com/ques... 

How can I make Visual Studio wrap lines at 80 characters?

...u change the size of the VS window. – Guilherme Salomé May 13 '15 at 19:22 3 ...
https://stackoverflow.com/ques... 

How to migrate/convert from SVN to Mercurial (hg) on windows

... I tried using svn:// instead of file:// but it keeps asking for Python bindings – fglez May 27 '09 at 14:30 ...
https://stackoverflow.com/ques... 

Difference between except: and except Exception as e: in Python

...ing to watch out for" looks a little weird now, but at the time I expected Python to pick the most specific except block, regardless of where it was, and was a little disappointed to find out otherwise. – Vanessa Phipps Sep 5 '14 at 15:37 ...
https://stackoverflow.com/ques... 

How to use `subprocess` command with pipes

... The output of ps.communicate()[0] in python3 returns a bytes object. – Miguel Ortiz Aug 18 at 14:48 add a comment  |  ...
https://stackoverflow.com/ques... 

Using print statements only to debug

I have been coding a lot in Python of late. And I have been working with data that I haven't worked with before, using formulae never seen before and dealing with huge files. All this made me write a lot of print statements to verify if it's all going right and identify the points of failure. But, ...
https://stackoverflow.com/ques... 

When I catch an exception, how do I get the type, file, and line number?

... @DanielPryden Python docs are also using the same unpacking method docs.python.org/2/library/traceback.html#traceback-examples – user Aug 7 '14 at 3:49 ...
https://stackoverflow.com/ques... 

List attributes of an object

... The issue of dict usage just showed up on r/python. someone pointed out that vars(a) is equivalent to a.__dict__ – David Jan 12 '13 at 5:15 5 ...
https://stackoverflow.com/ques... 

RVM is not a function, selecting rubies with 'rvm use …' will not work

... edited Jun 25 '16 at 18:38 René Vogt 38.7k1313 gold badges6060 silver badges8181 bronze badges answered Jun 25 '16 at 18:16 ...
https://stackoverflow.com/ques... 

Opening Android Settings programmatically

... edited Sep 15 at 16:15 Jéwôm' 2,84433 gold badges2626 silver badges5757 bronze badges answered May 29 at 18:39 ...