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Issue #16546: make ast.YieldFrom argument mandatory.

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This commit is contained in:
Mark Dickinson 2012-11-25 14:36:26 +00:00
parent 9982c53c2f
commit ded35aeb9d
7 changed files with 36 additions and 24 deletions
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8
Lib/test/test_ast.py
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@ -399,6 +399,14 @@ class AST_Tests(unittest.TestCase):
compile(m, "<test>", "exec")
self.assertIn("string must be of type str", str(cm.exception))
def test_empty_yield_from(self):
# Issue 16546: yield from value is not optional.
empty_yield_from = ast.parse("def f():\n yield from g()")
empty_yield_from.body[0].body[0].value.value = None
with self.assertRaises(ValueError) as cm:
compile(empty_yield_from, "<test>", "exec")
self.assertIn("field value is required", str(cm.exception))
class ASTHelpers_Test(unittest.TestCase):