diff options
Diffstat (limited to 'Lib')
-rw-r--r-- | Lib/pickle.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Lib/pickle.py b/Lib/pickle.py index 5837884..d24786a 100644 --- a/Lib/pickle.py +++ b/Lib/pickle.py @@ -862,6 +862,10 @@ class Unpickler: "unpickling" % callable if arg_tup is None: + import warnings + warnings.warn("The None return argument form of __reduce__ is " + "deprecated. Return a tuple of arguments instead.", + DeprecationWarning) value = callable.__basicnew__() else: value = apply(callable, arg_tup) |