rator.

Generator objects provide these attributes:
    __iter__        defined to support iteration over container
    close           raises a new GeneratorExit exception inside the
                    generator to terminate the iteration
    gi_code         code object
    gi_frame        frame object or possibly None once the generator has
                    been exhausted
    gi_running      set to 1 when generator is executing, 0 otherwise
    next            return the next item from the container
    send            resumes the generator and "sends" a value that becomes
                    the result of the current yield-expression
    throw           used to raise an exception inside the generator)