Question

In Python how to write from an array to a .txt file so that each row in the array is one row in the text file. Fill in all blank spaces in the array with a 0.

Answer 1

array = [
    [3, 9, 1, 7],
    [9, 0],
    [8, 3, 1, 9],
    [],
    [5, 9]
]

w = open('output.txt', 'w')
for row in array:
    if not row:
        w.write('0\n')
    else:
        for num in row:
            w.write(str(num) + " ")
        w.write("\n")
w.close()