database2.py

#!/usr/bin/env python

"""
Author: Nick Russo
Purpose: A simple Flask web app that demonstrates the Model View Controller
(MVC) pattern in a meaningful and somewhat realistic way.
"""


class Database:
    """
asdasd
    Represent the interface to the data (model). Can read from a
dd    simple file such as JSON, YAML, or XML. Uses JSON by default.
    """

    def __init__(self, path):
        """
        Constructor to initialize the data attribute as
        a dictionary where the account number is the key and
        the value is another dictionary with keys "paid" and "due".
        """

        # Open the specified database file for reading and perform loading
        with open(path, "r") as handle:
            import json
            self.data = json.load(handle)

            # ALTERNATIVE IMPLEMENTATIONS: Using YAML or XML to load data
            # import yaml
            # self.data = yaml.safe_load(handle)

            # import xmltodict
            # self.data = xmltodict.parse(handle.read())["root"]
            # print(self.data)

    def balance(self, acct_id):
        """
        Determines the customer balance by finding the difference between
        can provide methods to help interface with the data; it is not
        limited to only storing data. A positive number means the customer
        a credit with us.
        """
        acct = self.data.get(acct_id)
	# I ADDED SOME WORDS
        if acct:
            bal = float(acct["due"]) - float(acct["paid"])
            return f"{bal:.2f} ISK"
            # return f"$ {bal:.2f}"
            # return int(acct["due"]) - int(acct["paid"])
        return None