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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:
 def funnel(self, steps, timeframe=None, timezone=None, max_age=None, all_keys=False):
 """ Performs a Funnel query Returns an object containing the results for each step of the funnel. :param steps: array of dictionaries, one for each step. example: [{"event_collection":"signup","actor_property":"user.id"}, {"event_collection":"purchase","actor_property:"user.id"}] :param timeframe: string or dict, the timeframe in which the events happened example: "previous_7_days" :param timezone: int, the timezone you'd like to use for the timeframe and interval in seconds :param max_age: an integer, greater than 30 seconds, the maximum 'staleness' you're willing to trade for increased query performance, in seconds :all_keys: set to true to return all keys on response (i.e. "result", "actors", "steps") """

        params = self.get_params(
            steps=steps,
            timeframe=timeframe,
            timezone=timezone,
            max_age=max_age,
        )

        return self.api.query("funnel", params, all_keys=all_keys)