Docstring, new python class
Docstring, new python class

Added missing docstring and improved some existing docstring.

Commonists/wm_metrics,danmichaelo/wm_metrics,danmichaelo/wm_metrics,danmichaelo/wm_metrics,Commonists/wm_metrics,Commonists/wm_metrics,Commonists/wm_metrics,danmichaelo/wm_metrics