diff options
Diffstat (limited to 'Lib/pickle.py')
| -rw-r--r-- | Lib/pickle.py | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Lib/pickle.py b/Lib/pickle.py index e6d0037..b852fbd 100644 --- a/Lib/pickle.py +++ b/Lib/pickle.py @@ -57,9 +57,9 @@ compatible_formats = ["1.0", # Original protocol 0 HIGHEST_PROTOCOL = 4 # The protocol we write by default. May be less than HIGHEST_PROTOCOL. -# We intentionally write a protocol that Python 2.x cannot read; -# there are too many issues with that. -DEFAULT_PROTOCOL = 3 +# Only bump this if the oldest still supported version of Python already +# includes it. +DEFAULT_PROTOCOL = 4 class PickleError(Exception): """A common base class for the other pickling exceptions.""" @@ -376,8 +376,8 @@ class _Pickler: The optional *protocol* argument tells the pickler to use the given protocol; supported protocols are 0, 1, 2, 3 and 4. The - default protocol is 3; a backward-incompatible protocol designed - for Python 3. + default protocol is 4. It was introduced in Python 3.4, it is + incompatible with previous versions. Specifying a negative protocol version selects the highest protocol version supported. The higher the protocol used, the |