import argparse
import http.server
import cgitb 
cgitb.enable()  ## enable CGI error reporting

def web_server(port):

    server = http.server.HTTPServer
    handler = http.server.CGIHTTPRequestHandler #RequestsHandler

    server_address = ("", port)
    handler.cgi_directories = ["/cgi-bin", ]
    httpd = server(server_address, handler)
    print ("Starting web server with CGI support on port: %s ..." %port)
    httpd.serve_forever()

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='CGI Server Example')
    parser.add_argument('--port', action="store", dest="port", type=int, required=True)
    given_args = parser.parse_args()
    web_server(given_args.port)