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Code Issues Projects Releases Packages Wiki Activity Actions 8

inspect: Make Signature and Parameter hashable. Issue #20334.

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This commit is contained in:
Yury Selivanov 2014-04-08 11:46:50 -04:00
parent 3f73ca23cf
commit 67ae50ee1c
5 changed files with 52 additions and 13 deletions
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40
Lib/test/test_inspect.py
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@ -2513,11 +2513,29 @@ class TestSignatureObject(unittest.TestCase):
def bar(pos, *args, c, b, a=42, **kwargs:int): pass
self.assertEqual(inspect.signature(foo), inspect.signature(bar))
def test_signature_unhashable(self):
def test_signature_hashable(self):
S = inspect.Signature
P = inspect.Parameter
def foo(a): pass
sig = inspect.signature(foo)
foo_sig = inspect.signature(foo)
manual_sig = S(parameters=[P('a', P.POSITIONAL_OR_KEYWORD)])
self.assertEqual(hash(foo_sig), hash(manual_sig))
self.assertNotEqual(hash(foo_sig),
hash(manual_sig.replace(return_annotation='spam')))
def bar(a) -> 1: pass
self.assertNotEqual(hash(foo_sig), hash(inspect.signature(bar)))
def foo(a={}): pass
with self.assertRaisesRegex(TypeError, 'unhashable type'):
hash(sig)
hash(inspect.signature(foo))
def foo(a) -> {}: pass
with self.assertRaisesRegex(TypeError, 'unhashable type'):
hash(inspect.signature(foo))
def test_signature_str(self):
def foo(a:int=1, *, b, c=None, **kwargs) -> 42:
@ -2651,6 +2669,15 @@ class TestParameterObject(unittest.TestCase):
self.assertTrue(repr(p).startswith('<Parameter'))
self.assertTrue('"a=42"' in repr(p))
def test_signature_parameter_hashable(self):
P = inspect.Parameter
foo = P('foo', kind=P.POSITIONAL_ONLY)
self.assertEqual(hash(foo), hash(P('foo', kind=P.POSITIONAL_ONLY)))
self.assertNotEqual(hash(foo), hash(P('foo', kind=P.POSITIONAL_ONLY,
default=42)))
self.assertNotEqual(hash(foo),
hash(foo.replace(kind=P.VAR_POSITIONAL)))
def test_signature_parameter_equality(self):
P = inspect.Parameter
p = P('foo', default=42, kind=inspect.Parameter.KEYWORD_ONLY)
@ -2661,13 +2688,6 @@ class TestParameterObject(unittest.TestCase):
self.assertEqual(p, P('foo', default=42,
kind=inspect.Parameter.KEYWORD_ONLY))
def test_signature_parameter_unhashable(self):
p = inspect.Parameter('foo', default=42,
kind=inspect.Parameter.KEYWORD_ONLY)
with self.assertRaisesRegex(TypeError, 'unhashable type'):
hash(p)
def test_signature_parameter_replace(self):
p = inspect.Parameter('foo', default=42,
kind=inspect.Parameter.KEYWORD_ONLY)