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gh-143535: Dispatch on the second argument if generic method is instance-bindable #144615

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Merged
ambv merged 21 commits into from
Feb 24, 2026
+78 −2
Merged

gh-143535: Dispatch on the second argument if generic method is instance-bindable #144615

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5479e0f
Dispatch on the second argument if generic method is instance-bindable
johnslavik Feb 8, 2026
3455cd9
Only cut off first argument if method becomes bound
johnslavik Feb 9, 2026
1142577
Cutoff on function, not method!
johnslavik Feb 9, 2026
d05750f
Cut first argument after the fact!
johnslavik Feb 9, 2026
b81977b
Fix missing import
johnslavik Feb 9, 2026
f6afaec
Fix formatting
johnslavik Feb 9, 2026
9dac097
Intentionally don't handle an edge case
johnslavik Feb 9, 2026
354721b
Add tests
johnslavik Feb 9, 2026
d80e5d1
Fix formatting
johnslavik Feb 9, 2026
97f23cd
Add news entry
johnslavik Feb 9, 2026
12cd97a
Rewrite comments
johnslavik Feb 9, 2026
1a24e43
Inline argument cutoff condition
johnslavik Feb 9, 2026
615c284
Empty commit to unstuck GitHub processing recent push
johnslavik Feb 9, 2026
ab7d78c
Add correct GitHub references
johnslavik Feb 9, 2026
dd804d2
Make the implementation more debuggable
johnslavik Feb 10, 2026
85c318d
Fix `staticmethod` bug
johnslavik Feb 15, 2026
21dcd02
Assign the boolean directly
johnslavik Feb 16, 2026
4c1cfd7
Simplify method dispatch
johnslavik Feb 16, 2026
e3538f5
More meaningful variable names
johnslavik Feb 16, 2026
0878b55
Reiterate on the code
johnslavik Feb 16, 2026
373deb0
Write a "What's New" entry
johnslavik Feb 16, 2026
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Cut first argument after the fact!
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@johnslavik
johnslavik committed Feb 9, 2026
commit d05750f5d7ba8f3b54e7d17ab95b5504f0565dca
9 changes: 6 additions & 3 deletions Lib/functools.py
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,7 @@
# import weakref # Deferred to single_dispatch()
from operator import itemgetter
from reprlib import recursive_repr
from types import FunctionType, GenericAlias, MethodType, MappingProxyType, UnionType
from types import GenericAlias, MethodType, MappingProxyType, UnionType
from _thread import RLock

################################################################################
Expand Down Expand Up @@ -1096,12 +1096,15 @@ def __call__(self, /, *args, **kwargs):
'1 positional argument')
if self._skip_bound_arg:
method = self._dispatch(args[1].__class__)
if isinstance(method, FunctionType):
args = args[1:]
else:
method = self._dispatch(args[0].__class__)
if hasattr(method, "__get__"):
method = method.__get__(self._obj, self._cls)
if (
self._skip_bound_arg
and isinstance(method, MethodType)
and method.__self__ is self):
args = args[1:]
return method(*args, **kwargs)

def __getattr__(self, name):
Expand Down
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