diff options
Diffstat (limited to 'Lib/pickle.py')
| -rw-r--r-- | Lib/pickle.py | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/Lib/pickle.py b/Lib/pickle.py index 4e80cca574..926869ea7e 100644 --- a/Lib/pickle.py +++ b/Lib/pickle.py @@ -621,8 +621,11 @@ class Pickler: proto = self.proto n = len(obj) - if n == 0 and proto: - write(EMPTY_TUPLE) + if n == 0: + if proto: + write(EMPTY_TUPLE) + else: + write(MARK + TUPLE) return save = self.save @@ -639,13 +642,13 @@ class Pickler: self.memoize(obj) return - # proto 0, or proto 1 and tuple isn't empty, or proto > 1 and tuple + # proto 0 or proto 1 and tuple isn't empty, or proto > 1 and tuple # has more than 3 elements. write(MARK) for element in obj: save(element) - if n and id(obj) in memo: + if id(obj) in memo: # Subtle. d was not in memo when we entered save_tuple(), so # the process of saving the tuple's elements must have saved # the tuple itself: the tuple is recursive. The proper action @@ -660,10 +663,9 @@ class Pickler: write(POP * (n+1) + get) return - # No recursion (including the empty-tuple case for protocol 0). + # No recursion. self.write(TUPLE) - if obj: # No need to memoize empty tuple - self.memoize(obj) + self.memoize(obj) dispatch[TupleType] = save_tuple |