diff options
Diffstat (limited to 'Doc/library/pickle.rst')
| -rw-r--r-- | Doc/library/pickle.rst | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/Doc/library/pickle.rst b/Doc/library/pickle.rst index 0d64191..6e8430f 100644 --- a/Doc/library/pickle.rst +++ b/Doc/library/pickle.rst @@ -492,7 +492,7 @@ methods: .. method:: object.__getnewargs_ex__() - In protocols 4 and newer, classes that implements the + In protocols 2 and newer, classes that implements the :meth:`__getnewargs_ex__` method can dictate the values passed to the :meth:`__new__` method upon unpickling. The method must return a pair ``(args, kwargs)`` where *args* is a tuple of positional arguments @@ -504,15 +504,22 @@ methods: class requires keyword-only arguments. Otherwise, it is recommended for compatibility to implement :meth:`__getnewargs__`. + .. versionchanged:: 3.6 + :meth:`__getnewargs_ex__` is now used in protocols 2 and 3. + .. method:: object.__getnewargs__() - This method serve a similar purpose as :meth:`__getnewargs_ex__` but - for protocols 2 and newer. It must return a tuple of arguments ``args`` - which will be passed to the :meth:`__new__` method upon unpickling. + This method serve a similar purpose as :meth:`__getnewargs_ex__`, but + supports only positional arguments. It must return a tuple of arguments + ``args`` which will be passed to the :meth:`__new__` method upon unpickling. + + :meth:`__getnewargs__` will not be called if :meth:`__getnewargs_ex__` is + defined. - In protocols 4 and newer, :meth:`__getnewargs__` will not be called if - :meth:`__getnewargs_ex__` is defined. + .. versionchanged:: 3.6 + Before Python 3.6, :meth:`__getnewargs__` was called instead of + :meth:`__getnewargs_ex__` in protocols 2 and 3. .. method:: object.__getstate__() |