Re: [Python-Dev] frame.f_locals is writable

[Nick Coghlan]

Shane Holloway (IEEE) wrote:
For a little background, I'm working on making an edit and continue 
support in python a little more robust.  So, in replacing references to 
unmodifiable types like tuples and bound-methods (instance or class), I 
iterate over gc.get_referrers.

So, I'm working on frame types, and wrote this code::
    def replaceFrame(self, ref, oldValue, newValue):
        for name, value in ref.f_locals.items():
            if value is oldValue:
                ref.f_locals[name] = newValue
                assert ref.f_locals[name] is newValue
FWIW, this should work:
    def replaceFrame(self, ref, oldValue, newValue):
        for name, value in ref.f_locals.items():
            if value is oldValue:
                exec "ref.f_locals[name] = newValue"
                assert ref.f_locals[name] is newValue
And, no, you don't have to tell me that this is an evil hack. I already know 
that, since I discovered it earlier this evening by poking around in the C 
source code for PyFrame_LocalsToFast and then looking to see what code calls 
that function :)

Cheers,
Nick
--
Nick Coghlan   |   [EMAIL PROTECTED]   |   Brisbane, Australia
---------------------------------------------------------------
            http://boredomandlaziness.skystorm.net
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