Change function closure cell contents
Hello! Here's a very simple example (Python 3):
class C: .... def t(self): .... return __class__ .... C.t.__closure__[0] <cell at 0x0000000109eca0c0: type object at 0x00007f7f82c225b0>
My question is, what's the easiest/most natural way of changing the contents of this closure cell on PyPy? On CPython there's a way using ctypes. This is regarding https://github.com/python-attrs/attrs/issues/102, but the issue boils down to this. Cheers!
Hi Tin, On 27 July 2017 at 16:17, Tin Tvrtković <tinchester@gmail.com> wrote:
My question is, what's the easiest/most natural way of changing the contents of this closure cell on PyPy?
On PyPy you can do (tested on PyPy2): cell = g.func_closure[0] cell.__setstate__((43,)) # sets the 'cell_contents' attribute to 43 Armin
That seems to work! I'd just like to add, Armin, that whenever I have a question you are almost always the first to respond and your replies are always very helpful and insightful. It is very much appreciated; thank you. :) On Thu, Jul 27, 2017 at 11:59 PM Armin Rigo <armin.rigo@gmail.com> wrote:
Hi Tin,
On 27 July 2017 at 16:17, Tin Tvrtković <tinchester@gmail.com> wrote:
My question is, what's the easiest/most natural way of changing the contents of this closure cell on PyPy?
On PyPy you can do (tested on PyPy2):
cell = g.func_closure[0] cell.__setstate__((43,)) # sets the 'cell_contents' attribute to 43
Armin
participants (2)
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Armin Rigo -
Tin Tvrtković