two dimensional list in python code example

Example 1: 2d array python

array = [[value] * lenght] * height

//example
array = [[0] * 5] * 10

print(array)

Example 2: create a 2d array in python

def build_matrix(rows, cols):
    matrix = []

    for r in range(0, rows):
        matrix.append([0 for c in range(0, cols)])

    return matrix

if __name__ == '__main__':
    build_matrix(6, 10)

Example 3: two dimensional array python

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

Matrix[0][0] = 1
Matrix[0][6] = 3 # error! range... 
Matrix[6][0] = 3 # valid

Example 4: print 2d list in one line

import itertools
arr = [[1, 2, 3], [3, 4, 5]]
res = list(itertools.chain(*arr))
print(" ".join(map(str, res)))
1 2 3 3 4 5