[Python-Dev] Security capabilities in Python

[Michael Hudson]

James Y Knight <foom at fuhm.net> writes:

> On Apr 9, 2005, at 2:13 PM, Michael Hudson wrote:
>
>> The funniest I know is part of PyPy:
>>
>> def extract_cell_content(c):
>>     """Get the value contained in a CPython 'cell', as read through
>>     the func_closure of a function object."""
>>     # yuk! this is all I could come up with that works in Python 2.2
>> too
>>     class X(object):
>>         def __eq__(self, other):
>>             self.other = other
>>     x = X()
>>     x_cell, = (lambda: x).func_closure
>>     x_cell == c
>>     return x.other
>>
>> It would be unfortunate for PyPy (and IMHO, very un-pythonic) if this
>> process became impossible.
>
> It would be quite fortunate if you didn't have to do all that, and
> cell just had a "value" attribute, though.

Indeed.  The 2.2 compatibility issue remains, though.

Cheers,
mwh

-- 
  Presumably pronging in the wrong place zogs it.
                                        -- Aldabra Stoddart, ucam.chat