how to get 3 digits after decimal in python code example

Example 1: python 2 decimal places

print(format(432.456, ".2f"))

>> 432.45

print(format(321,".2f"))

>> 321.00

Example 2: check number of digits after decimal python

from math import floor
float_num = 7456.4597
float_decimal = float_num - floor(float_num)