def _get(self, obj):
        if not hasattr(obj, '_property_values'):
            raise RuntimeError("Cannot get a property value '%s' from a %s instance before HasProps.__init__" %
                               (self.name, obj.__class__.__name__))

        if obj._property_values not in self.name:
            return self._get_default(obj)
        else:
            return obj._property_values[self.name]
dataset/ETHPy150Open bokeh/bokeh/bokeh/core/properties.py/BasicProperty._get/swapped operands of `not in`