'if filter info exist'

def is_exist_filter(self, filter_feature_name, filter_log_name):

    if (not self.filter_info):
        return False
    for id2name in self.filter_info['filterInfos']:
        if ((id2name['icFeatureName'] == filter_feature_name) and (id2name['icFilterLogName'] == filter_log_name)):
            return True
    return False
