How to add Trailing zeroes to an integer

Question

I have a positive integer variable which can have values between 0 to 999. This integer is then passed to a software.

To pass into this software the integer should a

Answer 1

You can do this by using ljust and str, then casting the result as an int.

>>> numbers = [1, 19, 255]
>>> [int(str(num).ljust(3, '0')) for num in numbers]
[100, 190, 255]

More on ljust here: https://docs.python.org/2/library/stdtypes.html#string-methods