Change method signature to use filelike objects
Change method signature to use filelike objects

Better to define the method as using filehandles, as it allows
more flexibility in the way they can be used (streams, strings, files...)

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