CODEWITHSUNDEEP
pythonself
Mritunjay Kumar
Mritunjay Kumar

Reputation: 1

NameError: throwing error as name 'self' is not defined

class Account():

    def __init__(self,owner,balance):
        self.owner = owner
        self.balance = balance

    def __str__(self):
        return "Account owner : {}\nAccount balance: {}".format(self.owner,self.balance)


    def deposit(amount):
        print ("How much you want to deposit")
        amount = int(input())
        self.balance = (balance) + (amount)
        return "Deposit Accepted\nThe new balance is {}".format(self.balance)


    def withdraw(amount):
        if (self.balance >= amount):
            self.balance = self.balance - amount
            return "Withdrawal Accepted\nThe new balance is {}".format(self.balance)
        else:
            return "Insufficient funds!!"


Account_1 = Account("sammy",500)
print(Account_1)
Account_1.owner
Account_1.balance
Account_1.deposit()
Account_1.withdraw(650)
Account_1.withdraw(300)

while executing this code i am getting error as "NameError: name 'self' is not defined" i dont understand why i a getting this error since 'self' is used as 'self reference'for a class and i've done it already.

this code is just a simple problem which i got to solve while studying classes and methods.

Upvotes: 0

Views: 327

Answers (2)

kadekhar
kadekhar

Reputation: 71

deposit and withdraw are member functions. So member functions should have first argument as self. Then deposit function do not need an argument in the function definition. Here is the corrected code. Also it would be helpful if you post the stack trace for the error. That would help to zero in on the issue fast.

class Account():

def __init__(self,owner,balance):
    self.owner = owner
    self.balance = balance

def __str__(self):
    return "Account owner : {}\nAccount balance: {}".format(self.owner,self.balance)


def deposit(self):
    print ("How much you want to deposit")
    amount = int(input())
    self.balance = self.balance + amount
    return "Deposit Accepted\nThe new balance is {}".format(self.balance)


def withdraw(self, amount):
    if (self.balance >= amount):
        self.balance = self.balance - amount
        return "Withdrawal Accepted\nThe new balance is {}".format(self.balance)
    else:
        return "Insufficient funds!!"

Account_1 = Account("sammy",500) print(Account_1) Account_1.owner Account_1.balance Account_1.deposit() Account_1.withdraw(650) Account_1.withdraw(300)

Upvotes: 0

i alarmed alien
i alarmed alien

Reputation: 9520

self should be the first argument to any method in a class that uses self (e.g. self.balance), so your withdraw and deposit methods are missing a self:

def deposit(self,amount):
    print ("How much you want to deposit")
    amount = int(input())
    self.balance += amount
    return "Deposit Accepted\nThe new balance is {}".format(self.balance)


def withdraw(self,amount):
    if (self.balance >= amount):
        self.balance = self.balance - amount
        return "Withdrawal Accepted\nThe new balance is {}".format(self.balance)
    else:
        return "Insufficient funds!!"

Note that you're missing the amount in your self.deposit() statement. There's also a missing self in self.balance in your deposit method.

Upvotes: 2

Related Questions