code: def sizes(self, fileids=None) -> Generator[int, int, None]:
          
          if not fileids:
              fileids = self.fileids()
          # Create a generator, getting every path and computing filesize
          for path in self.abspaths(fileids):
              yield os.path.getsize(path)
docs: Returns a list of tuples, the fileid and size on disk of the file.
          This function is used to detect oddly large files in the corpus.