fix python list emptyness check
fix python list emptyness check


Former-commit-id: 213096b3e09669ee93d98da8157fb7eccd658019
Former-commit-id: 4838c4612042a63a645749b79cdca7db3695682d
Former-commit-id: b0951f5d0f77a9e948201477cc8fb621f7a62a0c
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy