group operators testing

@hargup 
`*` should be avoided in the code. Going with the [Zen of Python](http://legacy.python.org/dev/peps/pep-0020/) explicitly import the exact function you are about to use. `*` imports not only lead to memory overheads, they can lead to naming conflicts where you import two variables with the same name from two module and you don't know which one is used.