How should I use argcomplete in zsh?

Alright there is a way to do it, but it's not the way I really wanted it to be.

Anyway, here goes:

1. Install argcomplete:

   $ pip install argcomplete
   

2. Activate argcompolete:

   $ activate-global-python-argcomplete --user
   

3. Add this to ~/.zshrc:

   autoload bashcompinit
   bashcompinit
   source ~/.bash_completion.d/python-argcomplete.sh
   
   eval "$(register-python-argcomplete /path/to/the/to/be/completed/file1)"
   eval "$(register-python-argcomplete /path/to/the/to/be/completed/file2)"
   eval "$(register-python-argcomplete /path/to/the/to/be/completed/file3)"
   

   There's probably a solution to read out the to be completed files from another file, but I don't know how to do that.