Can't setup web extension

General
1

Hi,

I’m attempting to set up Mopidy on a raspberry pi. Everything was going OK until I needed to install a web extension. At that point I got an error saying pip command not found. I googled and found this post suggesting to use easy install. The only easy install I could find on my system was called easy_install-pypy, so I used that. I still couldn’t just type pip - I had to qualify the path:

sudo /usr/lib/pypy-upstream/bin/pip install Mopidy-MusicBox-Webclient

That seemed to work, but I cannot see the extension when hitting the mopidy HTTP server.

Can anyone tell me what’s going on here?

Thanks

2

The original Python implementation is called CPython. pypy is another implementation of the Python language. Both exists in versions compatible with the Python 2.7 and Python 3 versions of the Python language. Each combination of Python implementation and Python version installs packages into different locations on the file system. On a system with multiple implementations and/or versions installed you’ll usually have one pip command for each.

Thus, when you use pypy’s pip command to install the extension you install it in a location entirely unknown to the Python implementation that runs Mopidy.

Assuming you’re running Raspbian on your system, you can install pip for Python 2.7 with:

sudo apt-get install python-pip

This will give you two equivalent pip commands:

/usr/bin/pip
/usr/bin/pip2

If you use one of these to install the extension, Mopidy should find it when it is restarted.

3

Thanks very much for the detailed explanation, jodal - that was super helpful! I now have the web extension up and running.

Cheers