[3.9] bpo-42381: Allow walrus in set literals and set comprehensions (GH-23332)#23333
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…ythonGH-23332) Currently walruses are not allowerd in set literals and set comprehensions: >>> {y := 4, 4**2, 3**3} File "<stdin>", line 1 {y := 4, 4**2, 3**3} ^ SyntaxError: invalid syntax but they should be allowed as well per PEP 572. (cherry picked from commit b0aba1f) Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
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Doesn't backporting this to 3.9 mean that code that works with 3.9.1 would throw a syntax error in 3.9.0? |
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Yep, but precisely because if that is not backwards incompatible. No code that works in 3.9.0 will be broken in 3.9.1 |
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but they should be allowed as well per PEP 572.
(cherry picked from commit b0aba1f)
Co-authored-by: Pablo Galindo Pablogsal@gmail.com
https://bugs.python.org/issue42381