P = url.split('://')
If(p==https://):
   g=443
elif(p==http://):
   g=80
else:
   Print(p)

if url.lower().startswith('https://'):
    port = 443
else:
    port = 80

ftp://

port_dict = {
    'http': 80,
    'https': 443,
    'ftp': ... ,
    ......
    }
port = port_dict.get(url.split('://')[0].lower(), 80)

GET /{0} HTTP/1.0\r\nHost: {1}\r\nUser-agent: Python\r\n\r\n'