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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 async def delete(self):
 """ Deletes the dialog from your dialog list. If you own the channel this won't destroy it, only delete it from the list. """

        if self.is_channel:
            await self._client(functions.channels.LeaveChannelRequest(
                self.input_entity))
        else:
            if self.is_group:
                await self._client(functions.messages.DeleteChatUserRequest(
                    self.entity.id, types.InputPeerSelf()))
            await self._client(functions.messages.DeleteHistoryRequest(
                self.input_entity, 0))