Python: setting max for bank withdraw -

i'm new python , still trying hang of it. i'm attempting change processing function in following code user can not withdraw more money "bank" has on record, 500. hoping help. enter if statement >500?

#simple bank atm def main():     pin=7777;balance=500;pin=0;success=false     pin=getinput(pin)     pin,pin,balance,success=processing(pin,pin,balance,success)     display(success,balance)  #input function def getinput(pin):     pin=int(input(“please enter pin:”))     return pin  #processing function def processing(pin,pin,balance,success):     if pin==pin:         success=true         amt=float(input(“how withdraw?”))         balance=balance-amt         return pin,pin,balance,success     else:         success=false         return pin,pin,balance,success 

you can use if condition this.

if amt <= balance: #can't withdraw on current balance     balance -= amt else:     print("error. amount exceeds funds on record.") 

also, other things aside you're returning same thing inside if , else condition , if want return it's redundant have in both. can have after else statement @ same indentation level