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Issue 24190: Add inspect.BoundArguments.apply_defaults() method.

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This commit is contained in:
Yury Selivanov 2015-05-16 13:45:09 -04:00
parent 1392f71c39
commit b907a513c8
5 changed files with 91 additions and 21 deletions
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35
Lib/test/test_inspect.py
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@ -3153,6 +3153,41 @@ class TestBoundArguments(unittest.TestCase):
ba = sig.bind(20, 30, z={})
self.assertRegex(repr(ba), r'<BoundArguments \(a=20,.*\}\}\)>')
def test_signature_bound_arguments_apply_defaults(self):
def foo(a, b=1, *args, c:1={}, **kw): pass
sig = inspect.signature(foo)
ba = sig.bind(20)
ba.apply_defaults()
self.assertEqual(
list(ba.arguments.items()),
[('a', 20), ('b', 1), ('args', ()), ('c', {}), ('kw', {})])
# Make sure that we preserve the order:
# i.e. 'c' should be *before* 'kw'.
ba = sig.bind(10, 20, 30, d=1)
ba.apply_defaults()
self.assertEqual(
list(ba.arguments.items()),
[('a', 10), ('b', 20), ('args', (30,)), ('c', {}), ('kw', {'d':1})])
# Make sure that BoundArguments produced by bind_partial()
# are supported.
def foo(a, b): pass
sig = inspect.signature(foo)
ba = sig.bind_partial(20)
ba.apply_defaults()
self.assertEqual(
list(ba.arguments.items()),
[('a', 20)])
# Test no args
def foo(): pass
sig = inspect.signature(foo)
ba = sig.bind()
ba.apply_defaults()
self.assertEqual(list(ba.arguments.items()), [])
class TestSignaturePrivateHelpers(unittest.TestCase):
def test_signature_get_bound_param(self):