IRC User List Script - Updated for Python 3

ircuserlist-python3.py

#!/usr/bin/env python3
# IRC User List
# Written by Tom Hudson for the Raspberry Pi User Guide
# Updated 2017-01-03 for Python 3.*
# http://tomhudson.co.uk/

import sys, socket, time

RPL_NAMREPLY   = '353'
RPL_ENDOFNAMES = '366'

irc = {
    'host':          'chat.freenode.net',
    'port':          6667,
    'channel':       '#raspiuserguide',
    'namesinterval': 5
}

user = {
    'nick':       'botnick',
    'username':   'botuser',
    'hostname':   'localhost',
    'servername': 'localhost',
    'realname':   'Raspberry Pi Names Bot'
}

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

print('Connecting to {host}:{port}...'.format(**irc))
try:
    s.connect((irc['host'], irc['port']))
except socket.error:
    print('Error connecting to IRC server {host}:{port}'.format(**irc))
    sys.exit(1)

s.send('NICK {nick}\r\n'.format(**user).encode())
s.send('USER {username} {hostname} {servername} :{realname}\r\n'.format(**user).encode())
s.send('JOIN {channel}\r\n'.format(**irc).encode())
s.send('NAMES {channel}\r\n'.format(**irc).encode())

read_buffer = ''
names = []

while True:
    read_buffer += s.recv(1024).decode()
    lines = read_buffer.split('\r\n')
    read_buffer = lines.pop();
    for line in lines:
        response = line.rstrip().split(' ', 3)
        response_code = response[1]
        if response_code == RPL_NAMREPLY:
            names_list = response[3].split(':')[1]
            names += names_list.split(' ')
        if response_code == RPL_ENDOFNAMES:
            print('\r\nUsers in {channel}:'.format(**irc))
            for name in names:
                print(name)
            names = []
            time.sleep(irc['namesinterval'])
            s.send('NAMES {channel}\r\n'.format(**irc).encode())

ircuserlist.diff

1c1
< #!/usr/bin/env python
---
> #!/usr/bin/env python3
3a4
> # Updated 2017-01-03 for Python 3.*
28c29
< print 'Connecting to %(host)s:%(port)s...' % irc
---
> print('Connecting to {host}:{port}...'.format(**irc))
32c33
<     print 'Error connecting to IRC server %(host)s:%(port)s' % irc
---
>     print('Error connecting to IRC server {host}:{port}'.format(**irc))
35,38c36,39
< s.send('NICK %(nick)s\r\n' % user)
< s.send('USER %(username)s %(hostname)s %(servername)s :%(realname)s\r\n' % user)
< s.send('JOIN %(channel)s\r\n' % irc)
< s.send('NAMES %(channel)s\r\n' % irc)
---
> s.send('NICK {nick}\r\n'.format(**user).encode())
> s.send('USER {username} {hostname} {servername} :{realname}\r\n'.format(**user).encode())
> s.send('JOIN {channel}\r\n'.format(**irc).encode())
> s.send('NAMES {channel}\r\n'.format(**irc).encode())
44c45
<     read_buffer += s.recv(1024)
---
>     read_buffer += s.recv(1024).decode()
54c55
<             print '\r\nUsers in %(channel)s:' % irc
---
>             print('\r\nUsers in {channel}:'.format(**irc))
56c57
<                 print name
---
>                 print(name)
59c60
<             s.send('NAMES %(channel)s\r\n' % irc)
---
>             s.send('NAMES {channel}\r\n'.format(**irc).encode())