fill leading zeros python 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: how to append leading zeros in python

str.zfill(width)

Example 3: fill zero behind number python

f_num.strip().zfill(2)