scanner method

[Shahab Khan]

Hi Is there a way to add a reply to line 192 of overview.py

            raise ValueError("Invalid order {} .Possible values are {}".format (order,  self.getOrders()))

Please excuse the syntax error.

The same for line 73

And line 41.

[Tianning Li]

Yup, I will add them ASAP.

[Tianning Li]

The package is updated. Please check the latest version. Thanks for your advice.