Python: initialize multi-dimensional list

Question

I want to initialize a multidimensional list. Basically, I want a 10x10 grid - a list of 10 lists each containing 10 items.

Each list value should be initialized to

Answer 1

This is a job for...the nested list comprehension!

[[0 for i in range(10)] for j in range(10)]

Answer 2

An additional solution is to use NumPy library:

import numpy as np

zero_array = np.zeros((10, 10), dtype='int')

This can be easily converted to a regular python list with the .tolist() method if necessary.