diff options
| -rw-r--r-- | Lib/pickle.py | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/Lib/pickle.py b/Lib/pickle.py index 1fc1a65..4d7a5be 100644 --- a/Lib/pickle.py +++ b/Lib/pickle.py @@ -175,14 +175,18 @@ class Pickler: def memoize(self, obj): """Store an object in the memo.""" - # The memo is a dictionary mapping object ids to 2-tuples - # that contains the memo value and the object being memoized. - # The memo value is written to the pickle and will become + # The Pickler memo is a dictionary mapping object ids to 2-tuples + # that contain the Unpickler memo key and the object being memoized. + # The memo key is written to the pickle and will become # the key in the Unpickler's memo. The object is stored in the - # memo so that transient objects are kept alive during pickling. - - # The use of the memo length as the memo value is just a convention. - # The only requirement is that the memo values by unique. + # Pickler memo so that transient objects are kept alive during + # pickling. + + # The use of the Unpickler memo length as the memo key is just a + # convention. The only requirement is that the memo values be unique. + # But there appears no advantage to any other scheme, and this + # scheme allows the Unpickler memo to implemented as a plain (but + # growable) array, indexed by memo key. d = id(obj) memo_len = len(self.memo) self.write(self.put(memo_len)) |