Budget App - method returns method not int

Python
#1

Tell us what’s happening:
So I’ve got the metod in class Category:

def calculate_total_withdrawals(self):
        total_withdrawal = 0
        for i in range(len(self.ledger)):
            if self.ledger[i]['amount'] < 0:
                total_withdrawal += self.ledger[i]['amount']
        return total_withdrawal

which should return total_withdrawal which is an int, but in the function create_spend_chart I have the lines:

    for i in categories:
        full_withdrawals += Category(i).calculate_total_withdrawals

which give me the error:

File “/home/runner/FlawlessTechnoDebugging/budget.py”, line 73, in create_spend_chart
full_withdrawals += Category(i).calculate_total_withdrawals
TypeError: unsupported operand type(s) for +=: ‘int’ and ‘method’

I think that’s the problem, that it returns method, but i don’t get it why it does so

Your code so far

  class Category:
    def __init__(self, name):
        self.name = name
        self.ledger = list()

    def check_funds(self, amount):
        funds = 0
        for i in range(len(self.ledger)):
            funds = funds + self.ledger[i]["amount"]
        if funds < amount:
            return False
        else:
            return True

    def deposit(self, amount, description=''):
        self.dep = dict()
        self.dep["amount"] = amount
        self.dep["description"] = description
        self.ledger.append(self.dep)

    def withdraw(self, amount, description=''):
        self.withd = dict()
        self.withd["amount"] = amount
        self.withd["description"] = description
        if self.check_funds(amount):
            self.ledger.append(self.withd)
            return True
        else:
            return False

    def get_balance(self):
        total_dep = 0
        total_withd = 0
        for i in range(len(self.ledger)):
            total_dep += self.ledger[i]["amount"]
        return total_dep


    def transfer(self, amount, another_category):
        a = self.withdraw(amount, f"Transfer to {another_category.name}")
        b = another_category.deposit(amount, f"Transfer from {another_category.name}")

    def __str__(self):
        title = f"{self.name:*^30}\n"
        items = ""
        total = 0
        for i in range(len(self.ledger)):
            items += f"{self.ledger[i]['description'][0:23]:23}" + f"{self.ledger[i]['amount']:>7.2f}" + '\n'
            total += self.ledger[i]['amount']
        output = title + items + "Total: " + str(total)
        return output

    def calculate_total_withdrawals(self):
        total_withdrawal = 0
        for i in range(len(self.ledger)):
            if self.ledger[i]['amount'] < 0:
                total_withdrawal += self.ledger[i]['amount']
        return total_withdrawal


def calculate_percentage(sum, number):
    percentage = round(number/sum * 100, -1)
    return percentage

def create_spend_chart(categories):
    title = "Percentage spent by category\n"
    full_withdrawals = 0
    percentages = []
    x_axis = []
    y_axis = []
    bar = []
    for i in categories:
        full_withdrawals += Category(i).calculate_total_withdrawals
    for i in range(len(categories)):
        percentages.append(calculate_percentage(full_withdrawals, Category(categories[i]).calculate_total_withdrawals()))
    for i in range(10):
        y_axis.append(str(int(i) * 10) + '|')
        for per in percentages:
            if per == i:
                bar[percentages.index(per)] += 'o '
            else:
                bar[percentages.index(per)] += '  '

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36.

Challenge: Budget App

Link to the challenge:

#2

You forgot to add () at end… you’re calling a function
I guess, it’ll solve the error

2 Likes
#3

Thanks a lot, that is the cause of it

#4