python initialize 2d array of size n code example

Example 1: python initialize a 2d array

x = [[foo for i in range(10)] for j in range(10)]
# x is now a 10x10 array of 'foo' (which can depend on i and j if you want)

Example 2: python create n*n matrix

# Creates a list containing 5 lists, each of 8 items, all set to 0
w, h = 8, 5;
Matrix = [[0 for x in range(w)] for y in range(h)]

Example 3: python initialize a 2d array

bar = [SOME EXPRESSION for item in some_iterable]