大约有 40,000 项符合查询结果(耗时:0.0265秒) [XML]

https://stackoverflow.com/ques... 

How to access the ith column of a NumPy multidimensional array?

...0,2]] = something would modify test, and not create another array. But copy_test = test[:, [0,2]] does in fact create a copy as you say. – Akavall Apr 11 '14 at 16:19 ...
https://stackoverflow.com/ques... 

Is it valid to replace http:// with // in a ?

...wing parts: foo://example.com:8042/over/there?name=ferret#nose \_/ \______________/\_________/ \_________/ \__/ | | | | | scheme authority path query fragment When defining relative URIs (Section 5.2), you can omit any...
https://stackoverflow.com/ques... 

what is the right way to treat Python argparse.Namespace() as a dictionary?

...store me' >>> args.baz 'store me' Yes, it is okay to access the __dict__ attribute. It is a well-defined, tested, and guaranteed behavior. share | improve this answer | ...
https://stackoverflow.com/ques... 

How do I create a namespace package in Python?

... TL;DR: On Python 3.3 you don't have to do anything, just don't put any __init__.py in your namespace package directories and it will just work. On pre-3.3, choose the pkgutil.extend_path() solution over the pkg_resources.declare_namespace() one, because it's future-proof and already compatible w...
https://stackoverflow.com/ques... 

What's the common practice for enums in Python? [duplicate]

... @Joan You could do _unused, Shaded, Shiny, Transparent, Matte = range(5) – zekel Dec 9 '10 at 2:12 81 ...
https://stackoverflow.com/ques... 

Why does GCC generate 15-20% faster code if I optimize for size instead of speed?

...ssembly from gcc-4.6.4 -Os (executes in 0.709 secs): 00000000004004d2 <_ZL3addRKiS0_.isra.0>: 4004d2: 8d 04 37 lea eax,[rdi+rsi*1] 4004d5: c3 ret 00000000004004d6 <_ZL4workii>: 4004d6: 41 55 push r13 4...
https://stackoverflow.com/ques... 

Can't pickle when using multiprocessing Pool.map()

...r program to allow such methods to be pickled, registering it with the copy_reg standard library method. For example, Steven Bethard's contribution to this thread (towards the end of the thread) shows one perfectly workable approach to allow method pickling/unpickling via copy_reg. ...
https://stackoverflow.com/ques... 

What is the most efficient string concatenation method in python?

...iven the test case from mkoistinen's answer, having strings domain = 'some_really_long_example.com' lang = 'en' path = 'some/really/long/path/' The contenders are f'http://{domain}/{lang}/{path}' - 0.151 µs 'http://%s/%s/%s' % (domain, lang, path) - 0.321 µs 'http://' + domain + '/' + lang ...
https://stackoverflow.com/ques... 

Clang vs GCC for my Linux Development project

...inux-gnu/4.3.4/include/g++-v4/ostream:112: note: candidates are: std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>& (*)(std::basic_ostream<_CharT, _Traits>&)) [with _CharT = char, _Traits...
https://stackoverflow.com/ques... 

How to write a Python module/package?

...gt;> To group many .py files put them in a folder. Any folder with an __init__.py is considered a module by python and you can call them a package |-HelloModule |_ __init__.py |_ hellomodule.py You can go about with the import statement on your module the usual way. For more information...