libraries/botbuilder-core/botbuilder/core/turn_context.py
def activity(self, value):
        """
        Used to set TurnContext._activity when a context object is created. Only takes instances of Activities.
        :param value:
        :return:
        """
        if not isinstance(value, Activity):
            raise TypeError('TurnContext: cannot set `activity` to a type other than Activity.')
        else:
            self._activity = value
def activity(self, value):
        """
        Used to set TurnContext._activity when a context object is created. Only takes instances of Activities.
        :param value:
        :return:
        """
        if not isinstance(value, Activity):
            raise TypeError('TurnContext: cannot set `activity` to a type other than Activity.')
        else:
            self._activity = value
Used to set TurnContext._activity when a context object is created. Only takes instances of Activities.
        :param value:
        :return: