currency_converter_xe.py

import requests
from bs4 import BeautifulSoup as bs
import re
from dateutil.parser import parse

def convert_currency_xe(src, dst, amount):
    def get_digits(text):
        """Returns the digits and dots only from an input `text` as a float
        Args:
            text (str): Target text to parse
        """
        new_text = ""
        for c in text:
            if c.isdigit() or c == ".":
                new_text += c
        return float(new_text)
    
    url = f"https://www.xe.com/currencyconverter/convert/?Amount={amount}&From={src}&To={dst}"
    content = requests.get(url).content
    soup = bs(content, "html.parser")
    exchange_rate_html = soup.find_all("p")[2]
    # get the last updated datetime
    last_updated_datetime = parse(re.search(r"Last updated (.+)", exchange_rate_html.parent.parent.find_all("div")[-2].text).group()[12:])
    return last_updated_datetime, get_digits(exchange_rate_html.text)
    
    
if __name__ == "__main__":
    import sys
    source_currency = sys.argv[1]
    destination_currency = sys.argv[2]
    amount = float(sys.argv[3])
    last_updated_datetime, exchange_rate = convert_currency_xe(source_currency, destination_currency, amount)
    print("Last updated datetime:", last_updated_datetime)
    print(f"{amount} {source_currency} = {exchange_rate} {destination_currency}")