Python to rotate a string

rotate.py

# Given a number write a function that finds all rotations of its digits.
# For example for 197 the output would be 197, 971, and 719.

# Rotation is first diget to the moved to the end
# Last diget moved to the start

num = 1973

def rotate(num_str):
  return num_str[-1] + num_str[0:-1]
  

num_str = str(num)
length = len(num_str)

for i in range(length):
  print(num_str)
  num_str = rotate(num_str)