Budget App Error

Tell us what’s happening:
Hello, I am working on the budget app project . I received this ValueError and I don’t know what it mean. Can someone explain to me what this mean? I wrote my code just like the python string formatting shown below.

Your code so far
class Category:

def __init__(self, name):
    self.name = name
    self.amount = 0
    self.ledger = []

def deposit(self, amount, description=''):
    self.amount += amount
    self.ledger.append({"amount": amount, "description": description})

def withdraw(self, amount, description=''):
    if self.check_funds is False:
        return False
    else:
        self.amount -= amount
        self.ledger.append({"amount": amount * -1, "description": description})
        return True

def get_balance(self):
    return self.amount

def check_funds(self, amount):
    get_balance_amount = self.get_balance()
    if self.amount > get_balance_amount:
        return True
    else:
        return False

def transfer(self, amount, category):
    if self.check_funds(amount):
        self.amount -= amount
        self.ledger.append({"amount": amount * -1, "description": "[Destination Budget Category]"})
        category.ledger.append({"amount": amount, "description": "[Source Budget Category]"})

def __str__(self):
    title = self.name.center(30, "*") + "\n"
    item = ''
    for i in range(len(self.ledger)):
        item += '{:.23}'.format('self.ledger[i]["description"]') + '{:>7.2f}'.format('self.ledger[i]["amount"]') + "\n"

    total = self.get_balance()
    output = title + item + "Total: " + str(total)
    return output

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36.

Challenge: Budget App

Link to the challenge:

you are warpping your value in quotes, which makes it a string, and thus will no longer be a number.
you cannot format a string as a floating number.
try removing the quotes so that it looks more like this:

'{:>7.2f}'.format(self.ledger[i]["amount"])

this is of course, assuming that the value self.ledger[i][“amount”] is a number

Thank you. I removed the quote and the code worked. Now I just have to figure how to format ‘{:23}’.format(self.ledger[i][“description”]) to max have only 23 characters.