Fix pep8 warning.
Fix pep8 warning.

sumsuddinshojib/openface,xinfang/face-recognize,nmabhi/Webface,cmusatyalab/openface,nmabhi/Webface,Alexx-G/openface,francisleunggie/openface,cmusatyalab/openface,nmabhi/Webface,xinfang/face-recognize,cmusatyalab/openface,sumsuddinshojib/openface,Alexx-G/openface,francisleunggie/openface,nmabhi/Webface,Alexx-G/openface,sumsuddinshojib/openface,nhzandi/openface,Alexx-G/openface,nhzandi/openface,nhzandi/openface,francisleunggie/openface,xinfang/face-recognize,sumsuddinshojib/openface