Question

Create a user-defined exception "InvalidWidrawal" to be used as part of a banking system. This exception will be invoked as "raised InvalidWithdrawal(balance, amount)"whenever code is the banking system detects an attempt to withdraw some 'ammount' that is more than the 'balance'.

It is python

Answer 1

Note

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The below program is a small example of banking system with withdraw and deposit functionality. The whole program is to create with an intension to show how the exception works. In case of any issue please comment.

#################### PGM START ###################################

#Python user-defined exceptions
class Error(Exception):
   """Base class for other exceptions"""
   pass

#user defined exception for withdrawal
class InvalidWidrawal(Error):
   """Raised when the balance is less than amount to withdraw"""
   pass

#class for banking activities like deposit and withdraw
class Bank:
    def __init__(self,acct):
        self.balance=0
        self.accountNo=acct
  
  
    def deposit(self,amount):
        self.balance+=amount
      
    def withdraw(self,amount):
        self.balance-=amount
      
#main driver method     
if __name__=="__main__":
    acctNo="AMEX1221321"
  
    #setting the account number
    obj=Bank(acctNo)
  
    obj.deposit(float(input("Enter the amount to deposit: ")))
  
    print("Current balance: "+str(obj.balance))
  
    amount=float(input("Enter the amount to withdraw: "))
    try:
        if(amount<obj.balance):
            obj.withdraw(amount)
            print("New balance: "+str(obj.balance))
        else:
            raise InvalidWidrawal
    except InvalidWidrawal:
        print("Cant withdraw more than the balance")
       

#################### PGM END #################################
OUTPUT
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