8

I made a virtualenv, and a new blank django project. I want to install Channels. I'm using Python 3.6.3. I typed pip install -U channels and this is output:

...
Failed building wheel for twisted
...
Command "/home/marcin/Documents/django_projects/channels/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-ic8ux9ei/twisted/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-ox6bclm5-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/marcin/Documents/django_projects/channels/include/site/python3.6/twisted" failed with error code 1 in /tmp/pip-build-ic8ux9ei/twisted/

pip list OUTPUT:

...
Django (1.11.6)
...
pip (9.0.1)
...
setuptools (36.6.0)
...
wheel (0.29.0)
...

I see that I don't have Twisted, so I typed: pip install twisted. This is the output:

...
 Failed building wheel for twisted
...
Command "/home/marcin/Documents/django_projects/channels/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-build-a54n37_z/twisted/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record /tmp/pip-9p23ehnv-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/marcin/Documents/django_projects/channels/include/site/python3.6/twisted" failed with error code 1 in /tmp/pip-build-a54n37_z/twisted/

As you can see, the outputs are almost the same. How can I install Channels?

muru
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gongarek
  • 337

3 Answers3

14

The error message is not particularly helpful but it seems you are missing the python3.6-dev package, which is installed using apt:

sudo apt update
sudo apt install python3.6-dev

After this, repeat your installation using pip as before.

edwinksl
  • 24,109
6

You also need to the build-essential package if it hasn't been installed already. The complete install command is:

sudo apt-get install build-essential python3.6-dev
Steve Rawlinson
  • 61
-1

Faced a similar issue while installing rasa_core.

Resolved an issue in a couple of steps:

sudo apt-get update
sudo apt-get install build-esssential python3.6-dev

Finally able to install rasa_core successfully.

David Foerster
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  • 56
  • 97
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neel
  • 99