Python subprocess and raw_input

Question

Ok thanks everyone for help. I've second problem. I want chat when I watch stream and it's possible with irc. Server is irc.twitch.tv and channel is same as livestreamer name. When I tried this code, it gives me error.

# -*- coding: latin-1 -*-  
import subprocess  
print(35*"+")  
name = raw_input("Livestreamer name\n")  

hostVideo = subprocess.Popen(['livestreamer', 'twitch.tv/'+name, 'best'], stdout  =        subprocess.PIPE).communicate()[0]  
hostIrssi = subprocess.Popen(['irssi --connect=irc.twitch.tv --password=oauth:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx --nick=nickname'], stdout = subprocess.PIPE).communicate()[0]  

print hostVideo
print hostIrssi

This is error what I got

Traceback (most recent call last):
File "Livestreamer.py", line 7, in <module>
hostIrssi = subprocess.Popen(['irssi --connect=irc.twitch.tv --password=oauth:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx --nick=nickname'], stdout = subprocess.PIPE).communicate()[0]
File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
errread, errwrite)
 File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
raise child_exception
OSError: [Errno 2] No such file or directory

Also if possible, tell me how to make it join automatically right channel.

MY older post

I love watching twitch livestreams and I wanted to do script which asks livestreamer name and then send commands to terminal. Livestreamer command is like

livestreamer twitch.tv/user best  

So script must add "twitch.tv/" after livestreamer command and "best" after user. My code looks like:

# -*- coding: latin-1 -*-
import subprocess
user = raw_input("Livestreamers name:\n")
livestreamer = "livestreamer twitch.tv/"
host = subprocess.Popen(['livestreamer', 'twitch.tv/', user, 'best'], stdout = subprocess.PIPE).communicate()[0]

print host

Output is

livestreamer: error: unrecognized arguments:  best

If someone know whats wrong, Im so glad that. Also sorry my bad english. :)

Answer 1

You need to concatenate "twitch.tv/" with the username, so your final line should be

host = subprocess.Popen(['livestreamer', 'twitch.tv/'+user, 'best'], stdout=subprocess.PIPE).communicate()[0]

Also note that keyword ( name=value ) arguments shouldn't really have spaces around the equals sign for best conformance to the Python style guide in PEP 8

Answer 2

Your subprocess line is sending this command:

livestreamer twitch.tv/ user best  

This would start a process in the form of your example:

subprocess.Popen(['livestreamer', 'twitch.tv/%s' % user, 'best'], stdout = subprocess.PIPE).communicate()[0]