How to define a two-dimensional array?
I want to define a two-dimensional array without an initialized length like this:
list
Fastest way to check if a value exists in a list
What is the fastest way to know if a value exists in a list (a list with millions of values in it) and what its index is?
Get a list of numbers as input from the user
I tried to use input (Py3) /raw_input() (Py2) to get a list of numbers, however with the code
Transpose list of lists
Let’s take:
Getting a map() to return a list in Python 3.x
I’m trying to map a list into hex, and then use the list elsewhere. In python 2.6, this was easy:
Identify groups of continuous numbers in a list
I’d like to identify groups of continuous numbers in a list, so that:
How to deep copy a list?
After E0_copy = list(E0), I guess E0_copy is a deep copy of E0 since id(E0) is not equal to id(E0_copy). Then I modify E0_copy in the loop, but why is E0 not the same after?
Remove all occurrences of a value from a list?
In Python remove() will remove the first occurrence of value in a list.
Why does list.append evaluate to false in a boolean context?
Is there a reason being list.append evaluating to false? Or is it just the C convention of returning 0 when successful that comes into play? >>> u = [] >>> not u.append(6) True Answers: Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the … Read more
Transpose/Unzip Function (inverse of zip)?
I have a list of 2-item tuples and I’d like to convert them to 2 lists where the first contains the first item in each tuple and the second list holds the second item.