(self)
return None
The list of report keys (e.g. users) or None to just display all the data returned from the query. Each value
        in this list should be a list of the same dimension as the 'group_by' list. If group_by is None then keys
        must also be None.

        These allow you to specify which rows you expect in the output data.
        Its main use is to add rows for keys that don’t exist in the data.

        e.g.
            group_by = ['region', 'sub_region']
            keys = [['region1', 'sub1'], ['region1', 'sub2'] ... ]
The list of report keys (e.g. users) or None to just display all the data returned from the query. Each value
        in this list should be a list of the same dimension as the 'group_by' list. If group_by is None then keys
        must also be None.
The list of report keys ( e . g . users ) or None to just display all the data returned from the query . Each value in this list should be a list of the same dimension as the group_by list . If group_by is None then keys must also be None .
def keys(self):
        """
        The list of report keys (e.g. users) or None to just display all the data returned from the query. Each value
        in this list should be a list of the same dimension as the 'group_by' list. If group_by is None then keys
        must also be None.

        These allow you to specify which rows you expect in the output data.
        Its main use is to add rows for keys that don’t exist in the data.

        e.g.
            group_by = ['region', 'sub_region']
            keys = [['region1', 'sub1'], ['region1', 'sub2'] ... ]
        """
        return None
def keys ( self ) : return None