63
votes
13
answers
2.6K
views
How to comment out a block of Python code in Vim
I was wondering if there was any key mapping in Vim to allow me to indent certain lines of code (whether those
52
votes
3
answers
1.1K
views
Why does Python's hash of infinity have the digits of π?
The hash of infinity in Python has digits matching pi: >>> inf = float('inf') >>>
58
votes
11
answers
505
views
Safest way to convert float to integer in python?
Python's math module contain handy functions like floor & ceil. These functions take a floating point
61
votes
13
answers
1.2K
views
Calculating arithmetic mean (one type of average) in Python
Is there a built-in or standard library method in Python to calculate the arithmetic mean (one type of average
56
votes
18
answers
807
views
Convert a number range to another range, maintaining ratio
I'm trying to convert one range of numbers to another, maintaining ratio. Maths is not my strong point.
67
votes
30
answers
1.2K
views
Fastest way to list all primes below N
This is the best algorithm I could come up. def get_primes(n): numbers = set(range(n, 1, -1)) primes
59
votes
10
answers
1.6K
views
What is the standard way to add N seconds to datetime.time in Python?
Given a datetime.time value in Python, is there a standard way to add an integer number of seconds to it, so t
66
votes
16
answers
2.9K
views
What is the difference between '/' and '//' when used for division?
Is there a benefit to using one over the other? In Python 2, they both seem to return the same results: >&
53
votes
18
answers
784
views
How can I check for NaN values?
float('nan') results in Nan (not a number). But how do I check for it? Should be very easy, but I ca
58
votes
9
answers
1.9K
views
How to state in requirements.txt a direct github source
I've installed a library using the command pip install git+git://github.com/mozilla/elasticutils.git whi
51
votes
26
answers
318
views
How do I connect to a MySQL Database in Python?
How do I connect to a MySQL database using a python program?
61
votes
11
answers
518
views
Installing specific package versions with pip
I'm trying to install version 1.2.2 of the MySQL_python adaptor, using a fresh virtualenv created with th
60
votes
17
answers
3.1K
views
open() in Python does not create a file if it doesn't exist
What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it
55
votes
13
answers
1.8K
views
50
votes
9
answers
2.6K
views
reading v 7.3 mat file in python
I am trying to read a matlab file with the following code import scipy.io mat = scipy.io.loadmat('test.m
66
votes
3
answers
627
views
Why does numpy std() give a different result to matlab std()?
I try to convert matlab code to numpy and figured out that numpy has a different result with the std function.
54
votes
7
answers
732
views
What is the equivalent of MATLAB's repmat in NumPy
I would like to execute the equivalent of the following MATLAB code using NumPy: repmat([1; 1], [1 1 1]). How
59
votes
12
answers
2K
views
What is the Python equivalent of Matlab's tic and toc functions?
What is the Python equivalent of Matlab's tic and toc functions?
55
votes
10
answers
757
views
Representing and solving a maze given an image
What is the best way to represent and solve a maze given an image? Given an JPEG image (as seen above), wha
67
votes
12
answers
3K
views
List of tables, db schema, dump etc using the Python sqlite3 API
For some reason I can't find a way to get the equivalents of sqlite's interactive shell commands: .
