# BankAccount Example
# bankaccount.py file

class BankAccount:

    def __init__(self, the_acct_id, the_name, the_phone):
        self.acct_id = the_acct_id
        self.name = the_name
        self.phone = the_phone
        # _balance is private. It can only be used
        # in this class file.
        self._balance = 0.0

    def __str__(self):
        return f"{self.acct_id} {self.name} {self.phone}"

    def check_balance(self):
        return self._balance

    def deposit(self, the_amount):
        if the_amount > 0:
            self._balance += the_amount

    def withdraw(self, the_amount):
        if the_amount < self._balance and the_amount > 0:
            self._balance -= the_amount