[enh] handle ^
[enh] handle |
[enh] handle comparison operators
[enh] handle no in/is not
[enh] also handle not
[enh] handle AND
[enh] handle OR
[enh] handle a if b else c
[fix] bad docstring
[enh] handle equal
[enh] handle augmented assign operators
[enh] more tests, handle both side for ,
[enh] handle return
[enh] handle yield
[enh] handle del
[enh] handle assert
[enh] handle raise
[enh] handle exec
[enh] handle global
[enh] handle print