test.py

import sys
import os
import math
i = 1
fatal = "FATAL"
ex = "Such symbol does not exists!"
er = "You denial from upgrade!"
succ = "You successfully bought upgrade!"
answer = "Please choose option Y or N"
up = "[HINT]You should buy upgrade, this upgrade add +2 to your balance"
add = "[SUCCESSFULLY]You added 1 coin!"
wl = "[HINT]So that add +1 money to your balance!"
balance = 0
coins = "coins"
strbl = "CASH:"
while i <= 1:
    print(wl)
    plus = input("")
    if plus == "+":
        print(add)
        balance = balance + 1
        print(strbl, balance, coins)
    else:
        print(ex)
        break
        sys.exit()
        if balance >= 10:
            print(up)
          print(answer)
          quest = input("")
            if quest == "Y":
                print(succ)
                balance = balance - 10
                print(balance)
             #balance = balance + 2
                break
           else:
                if quest == "N":
             print(er)
                continue