8000 gh-124652: partialmethod simplifications by dg-pb · Pull Request #124788 · python/cpython · GitHub
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gh-124652: partialmethod simplifications #124788

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9262323
fix
dg-pb Sep 30, 2024
3c4edd8
test fixes
dg-pb Sep 30, 2024
2a843bc
merge
dg-pb Sep 30, 2024
f43b69e
minor edits
dg-pb Sep 30, 2024
90dc0fd
trailing placeholder restriction removed
dg-pb Sep 30, 2024
10ee972
rm commented code
dg-pb Sep 30, 2024
b76ffee
put back accidental removal
dg-pb Sep 30, 2024
8fa0ec5
test_trailing_placeholders and bug fix
dg-pb Sep 30, 2024
f323dbd
full backwards compatibility
dg-pb Oct 2, 2024
d217592
small edits
dg-pb Oct 2, 2024
88422c4
📜🤖 Added by blurb_it.
blurb-it[bot] Oct 17, 2024
79e9cff
Merge remote-tracking branch 'upstream/main' into gh-124652-partialme…
dg-pb Oct 17, 2024
27493b3
restore previous _unwrap_partial
dg-pb Oct 27, 2024
7b24727
is tuple rollback
dg-pb Jan 4, 2025
4f33459
leading trailing placeholder lift factored out
dg-pb Jan 8, 2025
c3df6e0
remove extra blank line
dg-pb Jan 8, 2025
fca3d7d
rollback unnecessary changes
dg-pb Jan 8, 2025
ec64137
Merge remote-tracking branch 'upstream/main' into gh-124652-partialme…
dg-pb May 8, 2025
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test_trailing_placeholders and bug fix
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@dg-pb
dg-pb committed Sep 30, 2024
commit 8fa0ec50e50dfd373e32d66ba474b06a61256972
13 changes: 11 additions & 2 deletions Lib/functools.py
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Original file line number Diff line number Diff line change
Expand Up @@ -310,7 +310,15 @@ def _partial_prepare_merger(args):
else:
order.append(i)
phcount = j - nargs
merger = itemgetter(*order) if phcount else None
if phcount:
if nargs == 1:
i = order[0]
def merger(all_args):
return (all_args[i],)
else:
merger = itemgetter(*order)
else:
merger = None
return phcount, merger

def _partial_repr(self):
Expand Down Expand Up @@ -403,7 +411,8 @@ def __setstate__(self, state):

phcount, merger = _partial_prepare_merger(args)

args = tuple(args) # just in case it's a subclass
if type(args) is not tuple:
args = tuple(args) # just in case it's a subclass
if kwds is None:
kwds = {}
elif type(kwds) is not dict: # XXX does it need to be *exactly* dict?
Expand Down
26 changes: 10 additions & 16 deletions Lib/test/test_functools.py
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Original file line number Diff line number Diff line change
Expand Up @@ -211,16 +211,16 @@ def foo(bar):
p2.new_attr = 'spam'
self.assertEqual(p2.new_attr, 'spam')

# def test_placeholders_trailing_trim(self):
# PH = self.module.Placeholder
# for args, call_args, expected_args in [
# [(PH,), (), ()],
# [(0, PH), (), (0,)],
# [(0, PH, 1, PH, PH, PH), (2,), (0, 2, 1)]
# ]:
# actual_args, actual_kwds = self.partial(capture, *args)(*call_args)
# self.assertEqual(actual_args, expected_args)
# self.assertEqual(actual_kwds, {})
def test_trailing_placeholders(self):
PH = self.module.Placeholder
for args, call_args, expected_args in [
[(PH,), (1,), (1,)],
[(0, PH), (1,), (0, 1)],
[(0, PH, 2, PH, PH), (1, 3, 4), (0, 1, 2, 3, 4)]
]:
actual_args, actual_kwds = self.partial(capture, *args)(*call_args)
self.assertEqual(actual_args, expected_args)
self.assertEqual(actual_kwds, {})

def test_placeholders(self):
PH = self.module.Placeholder
Expand Down Expand Up @@ -373,12 +373,6 @@ def test_setstate(self):
f()
self.assertEqual(f(2), ((2, 1), dict(a=10)))

# # Trailing Placeholder error
# f = self.partial(signature)
# msg_regex = re.escape("unexpected trailing Placeholders")
# with self.assertRaisesRegex(TypeError, f'^{msg_regex}$') as cm:
# f.__setstate__((capture, (1, PH), dict(a=10), dict(attr=[])))

def test_setstate_errors(self):
f = self.partial(signature)
self.assertRaises(TypeError, f.__setstate__, (capture, (), {}))
Expand Down
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