code: def locations_to_cache(locations, latest=False):
      
      cum_cache = lal.Cache()
      for source in locations:
          flist = glob.glob(source)
          if latest:
              def relaxed_getctime(fn):
                  # when building a cache from a directory of temporary
                  # low-latency frames, files might disappear between
                  # the glob() and getctime() calls
                  try:
                      return os.path.getctime(fn)
                  except OSError:
                      return 0
              flist = [max(flist, key=relaxed_getctime)]
  
          for file_path in flist:
              dir_name, file_name = os.path.split(file_path)
              _, file_extension = os.path.splitext(file_name)
  
              if file_extension in [".lcf", ".cache"]:
                  cache = lal.CacheImport(file_path)
              elif file_extension == ".gwf" or _is_gwf(file_path):
                  cache = lalframe.FrOpen(str(dir_name), str(file_name)).cache
              else:
                  raise TypeError("Invalid location name")
  
              cum_cache = lal.CacheMerge(cum_cache, cache)
      return cum_cache
docs: Return a cumulative cache file build from the list of locations
  
      Parameters
      ----------
      locations : list
          A list of strings containing files, globs, or cache files used to build
      a combined lal cache file object.
      latest : Optional, {False, Boolean}
          Only return a cache with the most recent frame in the locations.
          If false, all results are returned.
  
      Returns
      -------
      cache : lal.Cache
          A cumulative lal cache object containing the files derived from the
      list of locations