python add leading zero code example
Example 1: python add zero to string
# add zeros in front of a string
>>> n = '4'
>>> print(n.zfill(3))
004Example 2: how to append leading zeros in python
str.zfill(width)# add zeros in front of a string
>>> n = '4'
>>> print(n.zfill(3))
004str.zfill(width)