Issue #19611: handle implicit parameters in inspect.signature

inspect.signature now reports the implicit ``.0`` parameters generated by
the compiler for comprehension and generator expression scopes as if they
were positional-only parameters called ``implicit0``.

Patch by Jelle Zijlstra.
This commit is contained in:
Nick Coghlan 2016-06-04 14:40:03 -07:00
parent d62548afed
commit b4b966ece2
5 changed files with 56 additions and 0 deletions

View file

@ -2903,6 +2903,10 @@ class TestParameterObject(unittest.TestCase):
'is not a valid parameter name'):
inspect.Parameter('$', kind=inspect.Parameter.VAR_KEYWORD)
with self.assertRaisesRegex(ValueError,
'is not a valid parameter name'):
inspect.Parameter('.a', kind=inspect.Parameter.VAR_KEYWORD)
with self.assertRaisesRegex(ValueError, 'cannot have default values'):
inspect.Parameter('a', default=42,
kind=inspect.Parameter.VAR_KEYWORD)
@ -2986,6 +2990,17 @@ class TestParameterObject(unittest.TestCase):
with self.assertRaisesRegex(TypeError, 'name must be a str'):
inspect.Parameter(None, kind=inspect.Parameter.POSITIONAL_ONLY)
@cpython_only
def test_signature_parameter_implicit(self):
with self.assertRaisesRegex(ValueError,
'implicit arguments must be passed in as'):
inspect.Parameter('.0', kind=inspect.Parameter.POSITIONAL_ONLY)
param = inspect.Parameter(
'.0', kind=inspect.Parameter.POSITIONAL_OR_KEYWORD)
self.assertEqual(param.kind, inspect.Parameter.POSITIONAL_ONLY)
self.assertEqual(param.name, 'implicit0')
def test_signature_parameter_immutability(self):
p = inspect.Parameter('spam', kind=inspect.Parameter.KEYWORD_ONLY)
@ -3234,6 +3249,17 @@ class TestSignatureBind(unittest.TestCase):
ba = sig.bind(args=1)
self.assertEqual(ba.arguments, {'kwargs': {'args': 1}})
@cpython_only
def test_signature_bind_implicit_arg(self):
# Issue #19611: getcallargs should work with set comprehensions
def make_set():
return {z * z for z in range(5)}
setcomp_code = make_set.__code__.co_consts[1]
setcomp_func = types.FunctionType(setcomp_code, {})
iterator = iter(range(5))
self.assertEqual(self.call(setcomp_func, iterator), {0, 1, 4, 9, 16})
class TestBoundArguments(unittest.TestCase):
def test_signature_bound_arguments_unhashable(self):