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bpo-37645: add new function _PyObject_FunctionStr() (GH-14890)

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Additional note: the `method_check_args` function in `Objects/descrobject.c` is written in such a way that it applies to all kinds of descriptors. In particular, a future re-implementation of `wrapper_descriptor` could use that code.

CC @vstinner @encukou 


https://bugs.python.org/issue37645



Automerge-Triggered-By: @encukou
This commit is contained in:
Jeroen Demeyer 2019-11-05 16:48:04 +01:00 • committed by Miss Islington (bot)
parent b3966639d2
commit bf17d41826
11 changed files with 171 additions and 94 deletions
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38
Lib/test/test_extcall.py
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@ -52,15 +52,15 @@ Here we add keyword arguments
>>> f(1, 2, **{'a': -1, 'b': 5}, **{'a': 4, 'c': 6})
Traceback (most recent call last):
...
TypeError: f() got multiple values for keyword argument 'a'
TypeError: test.test_extcall.f() got multiple values for keyword argument 'a'
>>> f(1, 2, **{'a': -1, 'b': 5}, a=4, c=6)
Traceback (most recent call last):
...
TypeError: f() got multiple values for keyword argument 'a'
TypeError: test.test_extcall.f() got multiple values for keyword argument 'a'
>>> f(1, 2, a=3, **{'a': 4}, **{'a': 5})
Traceback (most recent call last):
...
TypeError: f() got multiple values for keyword argument 'a'
TypeError: test.test_extcall.f() got multiple values for keyword argument 'a'
>>> f(1, 2, 3, *[4, 5], **{'a':6, 'b':7})
(1, 2, 3, 4, 5) {'a': 6, 'b': 7}
>>> f(1, 2, 3, x=4, y=5, *(6, 7), **{'a':8, 'b': 9})
@ -118,7 +118,7 @@ Verify clearing of SF bug #733667
>>> g(*Nothing())
Traceback (most recent call last):
...
TypeError: g() argument after * must be an iterable, not Nothing
TypeError: test.test_extcall.g() argument after * must be an iterable, not Nothing
>>> class Nothing:
... def __len__(self): return 5
@ -127,7 +127,7 @@ Verify clearing of SF bug #733667
>>> g(*Nothing())
Traceback (most recent call last):
...
TypeError: g() argument after * must be an iterable, not Nothing
TypeError: test.test_extcall.g() argument after * must be an iterable, not Nothing
>>> class Nothing():
... def __len__(self): return 5
@ -247,17 +247,17 @@ What about willful misconduct?
>>> h(*h)
Traceback (most recent call last):
...
TypeError: h() argument after * must be an iterable, not function
TypeError: test.test_extcall.h() argument after * must be an iterable, not function
>>> h(1, *h)
Traceback (most recent call last):
...
TypeError: h() argument after * must be an iterable, not function
TypeError: test.test_extcall.h() argument after * must be an iterable, not function
>>> h(*[1], *h)
Traceback (most recent call last):
...
TypeError: h() argument after * must be an iterable, not function
TypeError: test.test_extcall.h() argument after * must be an iterable, not function
>>> dir(*h)
Traceback (most recent call last):
@ -268,38 +268,38 @@ What about willful misconduct?
>>> nothing(*h)
Traceback (most recent call last):
...
TypeError: NoneType object argument after * must be an iterable, \
TypeError: None argument after * must be an iterable, \
not function
>>> h(**h)
Traceback (most recent call last):
...
TypeError: h() argument after ** must be a mapping, not function
TypeError: test.test_extcall.h() argument after ** must be a mapping, not function
>>> h(**[])
Traceback (most recent call last):
...
TypeError: h() argument after ** must be a mapping, not list
TypeError: test.test_extcall.h() argument after ** must be a mapping, not list
>>> h(a=1, **h)
Traceback (most recent call last):
...
TypeError: h() argument after ** must be a mapping, not function
TypeError: test.test_extcall.h() argument after ** must be a mapping, not function
>>> h(a=1, **[])
Traceback (most recent call last):
...
TypeError: h() argument after ** must be a mapping, not list
TypeError: test.test_extcall.h() argument after ** must be a mapping, not list
>>> h(**{'a': 1}, **h)
Traceback (most recent call last):
...
TypeError: h() argument after ** must be a mapping, not function
TypeError: test.test_extcall.h() argument after ** must be a mapping, not function
>>> h(**{'a': 1}, **[])
Traceback (most recent call last):
...
TypeError: h() argument after ** must be a mapping, not list
TypeError: test.test_extcall.h() argument after ** must be a mapping, not list
>>> dir(**h)
Traceback (most recent call last):
@ -309,7 +309,7 @@ not function
>>> nothing(**h)
Traceback (most recent call last):
...
TypeError: NoneType object argument after ** must be a mapping, \
TypeError: None argument after ** must be a mapping, \
not function
>>> dir(b=1, **{'b': 1})
@ -351,17 +351,17 @@ Test a kwargs mapping with duplicated keys.
>>> g(**MultiDict([('x', 1), ('x', 2)]))
Traceback (most recent call last):
...
TypeError: g() got multiple values for keyword argument 'x'
TypeError: test.test_extcall.g() got multiple values for keyword argument 'x'
>>> g(a=3, **MultiDict([('x', 1), ('x', 2)]))
Traceback (most recent call last):
...
TypeError: g() got multiple values for keyword argument 'x'
TypeError: test.test_extcall.g() got multiple values for keyword argument 'x'
>>> g(**MultiDict([('a', 3)]), **MultiDict([('x', 1), ('x', 2)]))
Traceback (most recent call last):
...
TypeError: g() got multiple values for keyword argument 'x'
TypeError: test.test_extcall.g() got multiple values for keyword argument 'x'
Another helper function