currency_converter.py

import requests
import argparse

my_parser = argparse.ArgumentParser()
my_parser.add_argument(
    "--amount", action="store", type=int, required=True, help="Enter the amount"
)
my_parser.add_argument(
    "--f", action="store", type=str, required=True, help="Convert from"
)
my_parser.add_argument(
    "--t", action="store", type=str, required=True, help="Convert to"
)

args = my_parser.parse_args()
amount = args.amount
fromCountry = args.f
toCountry = args.t


class Currency_convertor:
    # empty dict to store the conversion rates
    rates = {}

    def __init__(self, url):
        data = requests.get(url).json()

        # Extracting only the rates from the json data
        self.rates = data["rates"]

    # function to do a simple cross multiplication between
    # the amount and the conversion rates
    def convert(self, from_currency, to_currency, amount):
        initial_amount = amount
        if from_currency != "EUR":
            amount = amount / self.rates[from_currency]

        # limiting the precision to 2 decimal places
        amount = round(amount * self.rates[to_currency], 2)
        print(
            "{} {} = {} {}".format(initial_amount, from_currency, amount, to_currency)
        )


# Driver code
if __name__ == "__main__":

    # YOUR_ACCESS_KEY = 'GET YOUR ACCESS KEY FROM fixer.io'
    url = str.__add__("http://data.fixer.io/api/latest?access_key=", YOUR_ACCESS_KEY)
    c = Currency_convertor(url)

    c.convert(fromCountry, toCountry, amount)