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A comment on PEP 572: Python assignment expressions has been accepted. Parent comment

Re:PEP 572: Python assignment expressions has been accepted by akvadrako on Tuesday July 03, 2018 @07:23AM (#17449244)
I'm not sure exactly, but my point is that a program transformation can do it. However, no transformation can change an import to other operations while perserving semantics.

Just for fun, this seems to work:

  (locals().pop('x', None), locals().setdefault('x', y))[1]
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Re:PEP 572: Python assignment expressions has been accepted by yorwba on Tuesday July 03, 2018 @07:47AM (#17449346)
That only works at top-level scope, where locals() == globals(). Inside a function, changing the dict returned by locals() doesn't actually change the variable.
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