Simple command line interface for fileinfo.com

fileinfo.py

#!/usr/bin/env python

import sys
import requests as req
from bs4 import BeautifulSoup

if not(len(sys.argv) == 2):
    sys.exit("Usage: fileinfo.py extension")

ext = str(sys.argv[1])
url = "https://fileinfo.com/extension/" + ext
resp = req.get(url)

soup = BeautifulSoup(resp.text, 'html.parser')
filetypes = soup.find_all("h2", class_="title")

if len(filetypes) > 0:
    for filetype in filetypes:
        print(filetype.text)
else:
    sys.exit('The extension ".' + ext + '" was not found.')