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How to use timeit module
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If you want to use timeit in an interactive Python session, there are two convenient options:
Use the IPython shell. It features the convenient %timeit special function:
In [1]: def f(x):
...: return x*x
...:
In [2]: %timeit for x in range(100): f(x)
10...
Counting the number of True Booleans in a Python List
...th the constant True, a simple sum is fine. However, keep in mind that in Python other values evaluate as True as well. A more robust solution would be to use the bool builtin:
>>> l = [1, 2, True, False]
>>> sum(bool(x) for x in l)
3
UPDATE: Here's another similarly robust so...
Making a request to a RESTful API using python
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@ParveenShukhala "Requests officially supports Python 2.6–2.7 & 3.3–3.5, and runs great on PyPy." -- pypi.python.org/pypi/requests
– danio
Dec 15 '16 at 9:10
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Reverse a string in Python
There is no built in reverse function for Python's str object. What is the best way of implementing this method?
28 Ans...
Storing Python dictionaries
I'm used to bringing data in and out of Python using CSV files, but there are obvious challenges to this. Are there simple ways to store a dictionary (or sets of dictionaries) in a JSON or pickle file?
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How can you check which options vim was compiled with?
... compiled with by executing
:version
To query for an exact feature like python you can use the has() function with the feature you are looking for. The code below will return a 1 if it has the feature or 0 if it does not.
:echo has('python')
For a list of features see :h +feature-list
For mor...
How to sum all the values in a dictionary?
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Well,Python 2.7.12 also works well with sum(d.values())
– LancelotHolmes
Jan 17 '17 at 1:14
7
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pydot and graphviz error: Couldn't import dot_parser, loading of dot files will not be possible
... sudo pip uninstall does not work if you have installed your package using python setup.py install in that case, follow this solution. This was at least the case on my Mountain Lion OSX Mac
– qtips
Aug 6 '13 at 0:43
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Calculating a directory's size using Python?
...s anybody got a nice routine for calculating the size of a directory using Python? It would be very nice if the routine would format the size nicely in Mb/Gb etc.
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Fastest way to list all primes below N
...ning: timeit results may vary due to differences in hardware or
version of Python.
Below is a script which compares a number of implementations:
ambi_sieve_plain,
rwh_primes,
rwh_primes1,
rwh_primes2,
sieveOfAtkin,
sieveOfEratosthenes,
sundaram3,
sieve_wheel_30,
ambi_sieve (requires numpy)...