Iterate a NumPy array in the for loop

A NumPy array can be iterated in the for statement like Python list.

import numpy

a = numpy.array([4, 5, 6, 7])

for n in a:
    print(n)

# 4
# 5
# 6
# 7

If the array is a matrix or tensor, the arrays are shown in the iteration.

import numpy

a = numpy.array([[4, 5, 6], [7, 8, 9]])

for n in a:
    print(n)

# [4 5 6]
# [7 8 9]