1 #!/usr/bin/env python3
   2 
   3 # This script calculates the percent reduction (things like 124,5 - 15%).
   4 # It takes in consideration floats entered with commas.
   5 # Results will be displayed as strings in the form e.g. 124,5 - 15% = 105,825
   6 
   7 from sys import argv
   8 script, total, part = argv
   9 
  10 ## If float ends with .00 it will be converted to integer
  11 def change_to_integer(n):
  12     if n - int(n) == 0.00:
  13         n = int(n)
  14     return n
  15 
  16 ## Commas replaced with dots → conversion to float
  17 total = float(total.replace(",", "."))
  18 part = float(part.replace(",", "."))
  19 
  20 final_result = total - (total * part / 100)
  21 
  22 ## Conversions to integers if floats ends with .00 → conversion to strings
  23 ## → replacement of dots with commas
  24 total = str(change_to_integer(total)).replace(".", ",")
  25 part = str(change_to_integer(part)).replace(".", ",")
  26 final_result = str(change_to_integer(final_result)).replace(".", ",")
  27 
  28 print("\n{} - {}% = {}\n".format(total, part, final_result))