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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>I find myself sometimes, when writing IO Code from C, wanting to pass memory that I have allocated internally and filled with data, to Python without copying it into a string object.<o:p></o:p></p><p class=MsoNormal>To this end, I have locally created a (2.x) method called PyBuffer_FromMemoryAndDestructor(), which is the same as PyBuffer_FromMemory() except that it will call a provided destructor function with an optional arg, to release the memory address given, when no longer in use.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>First of all, I’d futilely like to suggest this change for 2.x. The existing PyBuffer_FromMemory() provides no lifetime management.<o:p></o:p></p><p class=MsoNormal>Second, the ByBuffer object doesn’t support the new Py_buffer interface, so you can’t really use this then, like putting a memoryview around it. This is a fixable bug, otoh.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thirdly, in py3k I think the situation is different. There you would (probably, correct me if I’m wrong) emulate the old PyBuffer_FromMemory with a combination of the new PyBuffer_FromContiguous and a PyMemoryView_FromBuffer(). But this also does not allow any lifetime magement of the external memory. So, for py3k, I’d actually like to extend the Memoryview object, and provide something like PyMemoryView_FromExternal() that takes an optional pointer to a “void destructor(void *arg, void *ptr)) and an (void *arg), to be called when the buffer is released.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>K<o:p></o:p></p></div></body></html>