On Dec 27, 6:06 pm, Scott David Daniels <scott.dani...@acm.org> wrote: > Daniel Fetchinson wrote: > >.... I have a list to begin with which will be passed to the C function. > > > I assume converting the list to an array.array and passing that to the C > > > function doesn't make any difference in terms of speed since the > > operation itself will be done in the C function anyway. > > Right, but why bother to do the conversion in C where you'll have to > fiddle with refcounts and error propogation? convert in python, and > go to the underlying data in C.
I think you could use ctypes.c_int* 20, which is an awesome data type-- a 20-element array of integers. You could also use this, which I just discovered, and is actually moderately disturbing. #WARNING unsafe code >>> from ctypes import * >>> i= c_int(42) >>> pi= pointer(i) >>> pi[0] 42 >>> pi[1] 0 >>> pi[2] 0 >>> pi[1]= 20 >>> pi <__main__.LP_c_long object at 0x00A97D00> >>> pi[1] 20 What memory is it overwriting? -- http://mail.python.org/mailman/listinfo/python-list
