2d list in pyht code example

Example 1: 2d array python3

# 5x6, 2-d array of booleans using list comprehension:

matrix = [[False for col in range(6)] for row in range(5)]

# 6x5, 2-d array of banana's using list comprehension:

matrix = [['banana' for col in range(5)] for row in range(6)]

Example 2: 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