bind: leverage new genFunc
bind: leverage new genFunc

Change-Id: I79b0ec59dba91948a56fdd3d6a00801f9df0effd

go-python/gopy-gen,go-python/gopy-gen,go-python/gopy,go-python/gopy,lifei/gopy,kellrott/gopy,lifei/gopy,ericsnowcurrently/gopython-gopy,kellrott/gopy,ericsnowcurrently/gopython-gopy