'''
    getpagefromurl.py

    Jeff Ondich, 16 Jan 2009
    Tianna Avery, November 2018, updated for Python 3

    This program gives a brief illustration of how to use
    the urllib.request module to retrieve files stored on the
    network.  The program accepts an URL as a command-line
    argument, retrieves the text of the file specified by
    that URL, and prints the text to standard output.
'''

import sys
import urllib.request

if len(sys.argv) == 1:
    print(f'Usage: {sys.argv[0]} url', file=sys.stderr)
    exit()

url = sys.argv[1]

try:
    request = urllib.request.Request(url)
    response = urllib.request.urlopen(request)
    page_text = response.read().decode('utf-8')
    print(page_text)

except Exception as e:
    print(f'Trouble retrieving {url}.', file=sys.stderr)
    print(f'  {e}', file=sys.stderr)