format string with leading zeros python string format code example

Example 1: python convert number to string with leading zeros

str(1).zfill(2)
# 1 will be '01'

str(23).zfill(4)
# 23 will be '0023'

Example 2: string format zero padded int python

i = 69
s = f'{i:03}'  # for Python >= 3.6, zero padding to have 3 digits