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bpo-35224: Reverse evaluation order of key: value in dict comprehensions (GH-14139)

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… as proposed in PEP 572; key is now evaluated before value.

https://bugs.python.org/issue35224
(cherry picked from commit c8a35417db)

Co-authored-by: Jörn Heissler <joernheissler@users.noreply.github.com>
This commit is contained in:
Miss Islington (bot) 2019-06-22 15:34:03 -07:00 • committed by GitHub
parent fa23bd286f
commit 874ff65e0a
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8 changed files with 53 additions and 7 deletions
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5
Lib/test/test_named_expressions.py
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@ -212,6 +212,11 @@ class NamedExpressionAssignmentTest(unittest.TestCase):
self.assertEqual(a, False)
def test_named_expression_assignment_16(self):
a, b = 1, 2
fib = {(c := a): (a := b) + (b := a + c) - b for __ in range(6)}
self.assertEqual(fib, {1: 2, 2: 3, 3: 5, 5: 8, 8: 13, 13: 21})
class NamedExpressionScopeTest(unittest.TestCase):