fix variable scope
fix variable scope

grepmusic/redis_sorted_set_with_prefix_in_query_for_feed,grepmusic/redis_sorted_set_with_prefix_in_query_for_feed,grepmusic/redis_sorted_set_with_prefix_in_query_for_feed,grepmusic/redis_sorted_set_with_prefix_in_query_for_feed