allowance - simulate allowance calculation based on the salary, the number of childrens and their age

allowance.py

##
## Bismillaahirrahmaanirrahiim..
## Allahumma sholli 'alaa sayyidinaa Muhammad..
## 
## allowance.py
## created by marjuqi r.
## august 2018
## 
## run using : python allowance.py
##
## this simple program is designed to simulate allowance calculation
## based on the salary, the number of childrens and their age
##

from __future__ import unicode_literals
from prompt_toolkit import prompt

def sanitize_input(inputstr):
  sanitized = inputstr
  badstrings = [
      ' ',
      ';',
      '$',
      '&&',
      '../',
      '<',
      '>',
      '%3C',
      '%3E',
      '\'',
      '--',
      '\x00',
      '`',
      '(',
      ')',
      'file://',
      'input://'
  ]
  for badstr in badstrings:
      if badstr in sanitized:
          sanitized = sanitized.replace(badstr, '')
  return sanitized


def get_allowance_percentage_based_on_age(age):
  if age < 10:
    return 0.01
  elif age < 15:
    return 0.02
  elif age < 20:
    return 0.03
  else :
    return 0.03

def check_valid_integer(input):
  try:
     val = int(input)
     return True
  except ValueError:
     print("That's not a numeric! Please input a valid numeric")
     return False

def ui(command):
  return sanitize_input(prompt(command))

if __name__ == '__main__':

  print("====================")
  print ("salam,\nthis simple program is designed to simulate allowance calculation \nbased on the salary, the number of childrens and their age")
  print("====================")
  
  default_allowance_percentage = 0.03 # constant
  n_accomodated_childs = 3 # constant

  salary    = 0
  n_child   = 0
  allowances= 0
  childs    = []

  is_int = False
  while is_int == False:
    salary  = ui('Input your salary ? ')
    is_int = check_valid_integer(salary)

  is_int = False
  while is_int == False:
    n_child = ui('Input your number of child ? ')
    is_int = check_valid_integer(n_child)

  childs_string = ui('Input your childs age, separated by comma ? ')

  childs  = map(int, childs_string.split(","))
  salary  = float(salary)

  print('Your salary: ' + str(salary))
  print('Your n_child: ' + str(n_child))
  print('Your allowances detail: ')

  if int(n_child) == 1:
    allowances = salary * default_allowance_percentage
    print('- child ' + str(childs[0]) + ' yo : ' + str(default_allowance_percentage) + ' * ' + str(salary) + ' = '+ str(allowances))
  else :
    ii = 0
    childs.sort(reverse=True)
    while(ii < n_child and ii < n_accomodated_childs):
      percentage = get_allowance_percentage_based_on_age(childs[ii])
      allowance  = percentage * salary
      allowances +=allowance
      print('- child ' + str(childs[ii]) + ' yo : ' + str(percentage) + ' * ' + str(salary) + ' = '+ str(allowance))
      ii=ii+1

  print('Your total THP: ' + str(salary + allowances))