On Sat, 9 Apr 2005, 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
That's pretty amazing.
It would be unfortunate for PyPy (and IMHO, very un-pythonic) if this process became impossible.
Not a problem. func_closure is already a restricted attribute. IMHO, the clean way to do this is to provide a built-in function to get the cell content in a more direct and reliable way, and then put that in a separate module with other interpreter hacks. That both makes it easier to do stuff like this, and easier to prevent it simply by forbidding import of that module. -- ?!ng