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Title: PEP 572: TargetScopeError->SyntaxError, other SyntaxError adjustments by ncoghlan · Pull Request #1140 · python/peps · GitHub

Open Graph Title: PEP 572: TargetScopeError->SyntaxError, other SyntaxError adjustments by ncoghlan · Pull Request #1140 · python/peps

X Title: PEP 572: TargetScopeError->SyntaxError, other SyntaxError adjustments by ncoghlan · Pull Request #1140 · python/peps

Description: switch from the new TargetScopeError to a plain SyntaxError as per referenced python-dev discussion clarify rationale for those extra SyntaxError cases (we don't want current CPython implementation details to implicitly leak into the "do what CPython does" de facto language specification) broaden one of the error cases to handle the fact that CPython's symbol table analysis for a comprehension involves two different scopes and hence makes it difficult to detect when the target of a named expression in the iterable expression gets re-used as an iteration variable in the comprehension note that even dead code affects the symbol analysis pass

Open Graph Description: switch from the new TargetScopeError to a plain SyntaxError as per referenced python-dev discussion clarify rationale for those extra SyntaxError cases (we don't want current CPython implementa...

X Description: switch from the new TargetScopeError to a plain SyntaxError as per referenced python-dev discussion clarify rationale for those extra SyntaxError cases (we don't want current CPython implem...

Opengraph URL: https://github.com/python/peps/pull/1140

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cb27015 PEP 572: Update TargetScopeError section based on implementation ncoghlan Aug 5, 2019 https://github.com/python/peps/pull/1140/commits/cb270157377386b904f13715cc57f0e7c21b1b8d
7244266 Add note about dead code, fix markup ncoghlan Aug 5, 2019 https://github.com/python/peps/pull/1140/commits/7244266d72458851f132f4e46fd3f5345b5df7fd
6f7e3e6 PEP 572: address review comments ncoghlan Aug 9, 2019 https://github.com/python/peps/pull/1140/commits/6f7e3e67702593ea7dfc3f4d7ee805690f071c9a
2a86898 Add section noting post-acceptance changes ncoghlan Aug 9, 2019 https://github.com/python/peps/pull/1140/commits/2a868983100932085f21f86fd725daddff925162
64f21f7 python-dev reference for TargetScopeError removal ncoghlan Aug 9, 2019 https://github.com/python/peps/pull/1140/commits/64f21f7c25cb587e2f69242f8b892696a00a5912
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