Dave Opstad wrote: > One of the functions in a C extension I'm writing needs to return a > tuple of integers, where the length of the tuple is only known at > runtime. I'm currently doing a loop calling PyInt_FromLong to make the > integers,
What is the purpose of this first loop? In what variable-length storage are you storing these (Python) integers during this first loop? Something you created with (a) PyMem_Malloc (b) malloc (c) alloca (d) your_own_malloc? > then PyTuple_New, and finally a loop calling PyTuple_SET_ITEM > to set the tuple's items. Whew. Whew indeed. > Does anyone know of a simpler way? I can't use Py_BuildValue because I > don't know at compile-time how many values there are going to be. And > there doesn't seem to be a PyTuple_FromArray() function. > > If I'm overlooking something obvious, please clue me in! 1. Determine the length of the required tuple; this may need a loop, but only to _count_ the number of C longs that you have. 2. Use PyTuple_New. 3. Loop to fill the tuple, using PyInt_FromLong and PyTuple_SetItem. Much later, after thoroughly testing your code, gingerly change PyTuple_SetItem to PyTuple_SET_ITEM. Benchmark the difference. Is it anywhere near what you saved by cutting out the store_in_temp_array thing in the first loop? -- http://mail.python.org/mailman/listinfo/python-list
