Interleave multiple lists of the same length in Python
In Python, is there a good way to interleave two lists of the same length?
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How do I initialize a dictionary of empty lists in Python?
My attempt to programmatically create a dictionary of lists is failing to allow me to individually address dictionary keys. Whenever I create the dictionary of lists and try to append to one key, all of them are updated. Here’s a very simple test case:
What do ellipsis […] mean in a list?
I was playing around in python. I used the following code in IDLE:
Iterate over all pairs of consecutive items in a list
Given a list l = [1, 7, 3, 5] I want to iterate over all pairs of consecutive list items (1,7), (7,3), (3,5), i.e. for i in xrange(len(l) – 1): x = l[i] y = l[i + 1] # do something I would like to do this in a more compact way, like for x, … Read more
From list of integers, get number closest to a given value
Given a list of integers, I want to find which number is the closest to a number I give in input:
How can I get list of values from dict?
How can I get a list of the values in a dict in Python?
if else in a list comprehension
Python’s conditional expression is a if C else b and can’t be used as:
Extract first item of each sublist
I am wondering what is the best way to extract the first item of each sublist in a list of lists and append it to a new list. So if I have:
Splitting a list into N parts of approximately equal length
What is the best way to divide a list into roughly equal parts? For example, if the list has 7 elements and is split it into 2 parts, we want to get 3 elements in one part, and the other should have 4 elements.
Find the most common element in a list
What is an efficient way to find the most common element in a Python list?