Python 2.7.* issue

I just installed streamlink and I had this error when trying to launch a stream:

Traceback (most recent call last):
File "C:\Program Files (x86)\Streamlink\bin\streamlink-script.py", line 11, in <module>
from streamlink_cli.main import main
File "C:\Program Files (x86)\Streamlink\pkgs\streamlink_cli\main.py", line 17, in <module>
from streamlink.stream import StreamProcess
File "C:\Program Files (x86)\Streamlink\pkgs\streamlink\stream\__init__.py", line 5, in <module>
from .hds import HDSStream
File "C:\Program Files (x86)\Streamlink\pkgs\streamlink\stream\hds.py", line 16, in <module>
from .segmented import (SegmentedStreamReader,
File "C:\Program Files (x86)\Streamlink\pkgs\streamlink\stream\segmented.py", line 1, in <module>
from concurrent import futures
ImportError: No module named concurrent

I had Python 2.7.* (I don’t remember the exact version) and installing Python 3.5.2 fixed the issue. Maybe it was an error on my end, just wanted to point it out in case it might help someone.

[bastimeyer]

the problem doesn’t occur when running from the commandline

Because the streamlink pythonscript is using a different shebang, linking to the python3 executable.

it seems the error comes from the Streamlink GUI

No, this is not an error. The Twitch GUI is looking up python independently, so if python2 is listed before python3 in the system’s PATH env var, it will choose this instead. This is all documented in the wiki and also stated in the settings menu next to the input fields. The user is responsible for making sure that streamlink is working with the selected python version.

edit: I have updated the wiki with more details…

[skulblakka]

So you would think that Python 2.7 works for it.

It does. As far as I understand it the problem here is that with the way your configuration was setup, the GUI tried to start the python3 version of streamlink with python2.