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Actual meaning of 'shell=True' in subprocess
...the shell are nontrivial, you now require the reader and maintainer of the Python script (which may or may not be your future self) to understand both Python and shell script. Remember the Python motto "explicit is better than implicit"; even when the Python code is going to be somewhat more complex...
Class constants in python
In python, I want a class to have some "constants" (practically, variables) which will be common in all subclasses. Is there a way to do it with friendly syntax?
Right now I use:
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In Python, if I return inside a “with” block, will the file still close?
...e the finally block after a try block, i.e. it always executes (unless the python process terminates in an unusual way of course).
It is also mentioned in one of the examples of PEP-343 which is the specification for the with statement:
with locked(myLock):
# Code here executes with myLock hel...
Python: Append item to list N times
This seems like something Python would have a shortcut for. I want to append an item to a list N times, effectively doing this:
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How to use the pass statement?
I am in the process of learning Python and I have reached the section about the pass statement. The guide I'm using defines it as being a Null statement that is commonly used as a placeholder.
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How do I calculate percentiles with python/numpy?
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By the way, there is a pure-Python implementation of percentile function, in case one doesn't want to depend on scipy. The function is copied below:
## {{{ http://code.activestate.com/recipes/511478/ (r1)
import math
import functools
def percentile(N...
Is there a simple way to remove multiple spaces in a string?
... 1000)
test_string = 'The fox jumped over\n\t the log.' # trivial
Python 2.7.3, 32-bit, Windows
test | minum | maximum | average | median
---------------------+------------+------------+------------+-----------
while_replace_test | 0.001066 | 0.001260 | ...
django change default runserver port
...iest way to change (only) port in development Django server is just like:
python manage.py runserver 7000
that should run development server on http://127.0.0.1:7000/
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Python Dictionary Comprehension
Is it possible to create a dictionary comprehension in Python (for the keys)?
8 Answers
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How do I create a Python function with optional arguments?
I have a Python function which takes several arguments. Some of these arguments could be omitted in some scenarios.
2 Answe...