[ python-Bugs-1387650 ] weird behavior when assigning locals() to a variable

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Bugs item #1387650, was opened at 2005-12-22 00:04
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Category: Python Interpreter Core
Group: Python 2.3
Status: Open
Resolution: None
Priority: 5
Submitted By: Samuel Bayer (sambayer)
Assigned to: Nobody/Anonymous (nobody)
Summary: weird behavior when assigning locals() to a variable

Initial Comment:
Tried this on Python 2.3.3, under Redhat Linux
Enterprise 3, and on Python 2.3.5, under MacOS X
10.4.3. Don't have access to 2.4 anywhere, so I can't
test it, but I took a look at the bug queue and can't
find any reference to this problem.

The following function yields a KeyError when run:

def foo():
    b = locals()
    c = 5
    print b["c"]

The following function does not:

def foo():
    b = locals()
    c = 5
    locals()
    print b["c"]

There's no typo there. After referencing locals()
again, without updating the value of b, the printout works.

Note that b and locals(), as I believe is intended, are
identical:

def foo():
    b = locals()
    c = 5
    print id(b)
    print b.has_key()
    print id(locals())
    print b.has_key()

yields, when run:

>>> foo()
285984
False
285984
True

This has GOT to be a bug. 

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