Read the troll-chat from btc-e.com

btce-trollbox.py

#!/bin/env python
import re
import sys
import time
import requests
import lxml.html
from functools import reduce
from subprocess import Popen, PIPE

if '-l' in sys.argv:
    pipe = Popen(['less', '+F', '-R'], stdin=PIPE)
    write = lambda s: pipe.stdin.write(bytearray(s+'\n' ,'utf8'))
else:
    pipe = False
    write = print

newchats = None
while True:
    try:
        if pipe and pipe.poll() is not None:
            sys.exit(0)

        r = requests.get('http://btc-e.com')
        doc = lxml.html.document_fromstring(r.text)
        oldchats = newchats
        newchats = [{
                "id": e.attrib['id'][3:],
                "text": e.cssselect('span')[0].text,
                "username": e.cssselect('a')[0].text,
            }
            for e in doc.cssselect('#nChat p')
        ]

        for chat in newchats:
            if not oldchats or chat not in oldchats:
                color = reduce(lambda x, y: x + y, [ord(c) for c in chat['username']]) % 240
                write("\033[38;5;{}m{}\033[0m: {}".format(color, chat['username'], chat['text']))


        if pipe and pipe.poll() is None:
            pipe.stdin.flush()

        for x in range(0, 50):
            time.sleep(0.1)
            if pipe and pipe.poll() is not None:
                sys.exit(0)

    except KeyboardInterrupt:
        if not pipe:
            sys.exit(0)