for loop np array code example

Example 1: iterate through an array python

colors = ["red", "green", "blue", "purple"]
i = 0
while i < len(colors):
    print(colors[i])
    i += 1

Example 2: iterate over rows in numpy matrix python

import numpy
m = numpy.ones((3,5),dtype='int')
for row in m:
  # do stuff with row