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List comprehension vs map
...? Is either of them generally more efficient or considered generally more pythonic than the other?
11 Answers
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How do I check what version of Python is running my script?
How can I check what version of the Python Interpreter is interpreting my script?
21 Answers
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Is Python interpreted, or compiled, or both?
... there are C interpreters and projects that attempt to compile a subset of Python to C or C++ code (and subsequently to machine code).
Second, compilation is not restricted to ahead-of-time compilation to native machine code. A compiler is, more generally, a program that converts a program in one p...
How can I add the sqlite3 module to Python?
... me how to install the sqlite3 module alongside the most recent version of Python?
I am using a Macbook, and on the command line, I tried:
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Is calculating an MD5 hash less CPU intensive than SHA family functions?
...running the exact same binaries of OpenSSL 1.0.1j 15 Oct 2014 from the ArchLinux official package.
My opinion on this is that with the added security of sha1, cpu designers are more likely to improve the speed of sha1 and more programmers will be working on the algorithm's optimization than md5sum....
Broken references in Virtualenvs
...u create a virtualenv, many symlinks are created to the Homebrew installed Python.
Here is one example:
$ ls -la ~/.virtualenvs/my-virtual-env
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lrwxr-xr-x 1 ryan staff 78 Jun 25 13:21 .Python -> /usr/local/Cellar/python/2.7.7/Frameworks/Python.framework/Versions/2.7/Python
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When you ...
TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...server端如果在一定时间内没有收到的TCP会重发SYN-ACK。在Linux下，默认重试次数为5次，重试的间隔时间从1s开始每次都翻售，5次的重试时间间隔为1s, 2s, 4s, 8s, 16s，总共31s，第5次发出后还要等32s都知道第5次也超时了，所以，总共...
std::wstring VS std::string
...ar_t is supposed to hold a wide character, and then, things get tricky:
On Linux, a wchar_t is 4 bytes, while on Windows, it's 2 bytes.
What about Unicode, then?
The problem is that neither char nor wchar_t is directly tied to unicode.
On Linux?
Let's take a Linux OS: My Ubuntu system is already...
When should iteritems() be used instead of items()?
...instead of iteritems() in all places? Why was iteritems() removed from Python 3? Seems like a terrific and useful method. What's the reasoning behind it?
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error: command 'gcc' failed with exit status 1 while installing eventlet
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Your install is failing because you don't have the python development headers installed. You can do this through apt on ubuntu/debian with:
sudo apt-get install python-dev
for python3 use:
sudo apt-get install python3-dev
For eventlet you might also need the libevent l...