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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 GroupSensorsFind(self, group_id, parameters, filters, namespace = None):

 """
 Find sensors in a group based on a number of filters on metatags
 
 @param group_id (int) - Id of the group in which to find sensors
 @param namespace (string) - Namespace to use in filtering on metatags
 @param parameters (dictionary) - Dictionary containing additional parameters
 @param filters (dictionary) - Dictioanry containing the filters on metatags
 
 @return (bool) - Boolean indicating whether GroupSensorsFind was successful
 """

        ns = "default" if namespace is None else namespace
        parameters['namespace'] = ns
        if self.__SenseApiCall__("/groups/{0}/sensors/find.json?{1}".format(group_id, urllib.urlencode(parameters, True)), "POST", parameters = filters):
            return True
        else:
            self.__error__ = "api call unsuccessful"
            return False