10     __slots__ = ('expression', '_distinct', '_order_by', '_within',  variable in Aggregate
132     __slots__ = ()  variable in Avg
137     __slots__ = ()  variable in BitAnd
142     __slots__ = ()  variable in BitOr
147     __slots__ = ()  variable in BoolAnd
152     __slots__ = ()  variable in BoolOr
157     __slots__ = ()  variable in Count
170     __slots__ = ()  variable in Every
175     __slots__ = ()  variable in Max
180     __slots__ = ()  variable in Min
185     __slots__ = ()  variable in Stddev
190     __slots__ = ()  variable in Sum
195     __slots__ = ()  variable in Variance