[Python-bugs-list] [ python-Bugs-810714 ] nested variables in 'class:' statements

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Bugs item #810714, was opened at 2003-09-22 17:05
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Category: Python Interpreter Core
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Armin Rigo (arigo)
Assigned to: Nobody/Anonymous (nobody)
Summary: nested variables in 'class:' statements

Initial Comment:
from the user's point of view, variables originating

from nested scopes could erratically become bound in

the 'class' statement.



The 'class:' statements works by capturing all locals()

after executing the body; however, this is not exactly

the same as what an explicit call to locals() would

return because of the missing PyFrame_FastToLocals()

call in the implementation of LOAD_LOCALS in ceval.c.

It was thought that PyFrame_FastToLocals() was

unnecessary at that point because the class body

bytecode only uses LOAD_NAME/STORE_NAME and not fast

locals -- but this is no longer true with nested

scopes. See attached examples.



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