From 868bfcc02ed42a1042851830b79c6877b7f1c7a8 Mon Sep 17 00:00:00 2001 From: rimchoi Date: Sun, 3 Nov 2024 02:04:53 +0900 Subject: [PATCH] gh-125832: Clarify comment for inlined comprehensions as per PEP-709 (#126322) * Fix comprehensions comment to inlined by pep 709 * Update spacing Co-authored-by: RUANG (James Roy) * Add reference to PEP 709 --------- Co-authored-by: Carol Willing Co-authored-by: RUANG (James Roy) --- Python/codegen.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/Python/codegen.c b/Python/codegen.c index d79aee4859e51b..c060ed76f1eb5c 100644 --- a/Python/codegen.c +++ b/Python/codegen.c @@ -4087,9 +4087,12 @@ codegen_call_helper(compiler *c, location loc, return codegen_call_helper_impl(c, loc, n, args, NULL, keywords); } -/* 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