Issue #8814: function annotations (the `__annotations__` attribute)
are now included in the set of attributes copied by default by
functools.wraps and functools.update_wrapper. Patch by Terrence Cole.
diff --git a/Lib/functools.py b/Lib/functools.py
index 863706d..e244070 100644
--- a/Lib/functools.py
+++ b/Lib/functools.py
@@ -19,7 +19,7 @@
# update_wrapper() and wraps() are tools to help write
# wrapper functions that can handle naive introspection
-WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__')
+WRAPPER_ASSIGNMENTS = ('__module__', '__name__', '__doc__', '__annotations__')
WRAPPER_UPDATES = ('__dict__',)
def update_wrapper(wrapper,
wrapped,
@@ -37,7 +37,8 @@
function (defaults to functools.WRAPPER_UPDATES)
"""
for attr in assigned:
- setattr(wrapper, attr, getattr(wrapped, attr))
+ if hasattr(wrapped, attr):
+ setattr(wrapper, attr, getattr(wrapped, attr))
for attr in updated:
getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
# Return the wrapper so this can be used as a decorator via partial()