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Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
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If you have several versions of Python installed, /usr/bin/env will ensure the interpreter used is the first one on your environment's $PATH. The alternative would be to hardcode something like #!/usr/bin/python; that's ok, but less flexible.
In Unix, an e...
Python 3 turn range to a list
...ing to write/read, so I'm attempting to make a list with a range in it. In Python 2 it seems that:
8 Answers
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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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Threading in a PyQt application: Use Qt threads or Python threads?
...nchrnous signals/slots, event loop, etc.).
Also, you can't use Qt from a Python thread (you can't for instance
post event to the main thread through QApplication.postEvent): you
need a QThread for that to work.
A general rule of thumb might be to use QThreads if you're going to interact s...
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 do I find the location of Python module sources?
How do I learn where the source file for a given Python module is installed? Is the method different on Windows than on Linux?
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What is the maximum recursion depth in Python, and how to increase it?
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It is a guard against a stack overflow, yes. Python (or rather, the CPython implementation) doesn't optimize tail recursion, and unbridled recursion causes stack overflows. You can check the recursion limit with sys.getrecursionlimit:
import sys
print(sys.getrecursionli...
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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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 ...