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[3.13] gh-125832: Clarify comment for inlined comprehensions as per PEP-709 (gh-126322) #126344

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Nov 3, 2024
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[3.13] gh-125832: Clarify comment for inlined comprehensions as per PEP-709 (gh-126322) #126344

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gh-125832: Clarify comment for inlined comprehensions as per PEP-709 …
rimi0108 Nov 2, 2024
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corona10 Nov 3, 2024
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9 changes: 6 additions & 3 deletions Python/compile.c
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Expand Up @@ -5315,9 +5315,12 @@ compiler_call_helper(struct compiler *c, location loc,
}


/* List and set comprehensions and generator expressions work by creating a
nested function to perform the actual iteration. This means that the
iteration variables don't leak into the current scope.
/* List and set comprehensions work by being inlined at the location where
they are defined. The isolation of iteration variables is provided by
pushing/popping clashing locals on the stack. Generator expressions work
by creating a nested function to perform the actual iteration.
This means that the iteration variables don't leak into the current scope.
See https://peps.python.org/pep-0709/ for additional information.
The defined function is called immediately following its definition, with the
result of that call being the result of the expression.
The LC/SC version returns the populated container, while the GE version is
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