Heh?

43 def read_data_from_cache(memory,address,cache):
44     (cache_storage,address_to_cache_loc,cache_loc_to_address,location_stack) = cache
45     location_stack = evict_location(location_stack)
46     # If the data is not yet in the cache, fetch it from the DRAM
47     # Note this may result in eviction, which could modify the memory
48     if address not in address_to_cache_loc:
49         (memory,cache) = write_data_to_cache(memory,address,cache):