I think this line is too long.

Docstrings should be in a format like:

<pre>
short one liner summary of what the function does (no trailing periods)

If additional details are necessary leave a blank line followed by detailed information
on what the function does in detail this can be as many lines as you wish

and have as many paragraphs as necessary to describe the function.

Params:
    list any inputs     - followed by their description
    may have many       - description

Returns:
    details on return values no none if nothing is returned
</pre>

For some examples take a look at plugin.py

https://github.com/Freeseer/freeseer/blob/master/src/freeseer/framework/plugin.py#L114