error: no commands supplied when trying to import python library

I just installed the library Pyunicorn, which apparently went well. Then when I import it or run a script that imports it, I get the following error:

usage:  [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or:  --help [cmd1 cmd2 ...]
   or:  --help-commands
   or:  cmd --help

error: no commands supplied

Can somebody help me?

Solution

The problem was in the file __init__ in the pyunicorn library. There there is a line from setup import __version__ which gives a bug. It should be erased!

Once this line is erased it is gonna work.

Here is a link to the bug.