Python 2 Десятичные места
print(format(432.456, ".2f"))
>> 432.45
print(format(321,".2f"))
>> 321.00
Wild Weasel
print(format(432.456, ".2f"))
>> 432.45
print(format(321,".2f"))
>> 321.00
number_dec = str(number-int(number))[1:]
decimal = input("Input decimal number: ") #123.456
# split 123.456 by dot = ['123', '456']
after_coma = decimal.split('.')[1]
# because only index 1 is taken then '456'
print(after_coma) # '456'