convert-currency.py

#!/usr/bin/env python3

import requests
from dateutil.parser import parse

def main():
    fromcur = input("From currency : ")
    tocur = input("To currency : ")
    amount = float(input("Amount : "))
    date = input("Date : ")
    if not date:
        date = "latest"

    res = requests.get("https://api.exchangeratesapi.io/" + date + "?base=" + fromcur + "&symbols=" + tocur)
    data = res.json()
    rate = data["rates"][tocur]

    print("{} {} = {} {}".format(amount, fromcur, amount * rate, tocur))

if __name__ == "__main__":
    main()