[Numpy-discussion] Extending C with Python
robert.kern at gmail.com
Wed Jan 31 01:52:00 EST 2018
On Wed, Jan 31, 2018 at 3:25 PM, Jialin Liu <jalnliu at lbl.gov> wrote:
> I'm extending C with python (which is opposite way of what people usually
> do, extending python with C), I'm currently stuck in passing a C array to
> python layer, could anyone plz advise?
> I have a C buffer in my C code and want to pass it to a python function.
> In the C code, I have:
> npy_intp dims ;
>> dims = 10;
>> dims = 20;
>> npy_intp m=2;
>> PyObject * py_dims = PyArray_SimpleNewFromData(1, &m, NPY_INT16 ,(void
>> *)dims ); // I also tried NPY_INT
>> PyObject_CallMethod(pInstance, method_name, "O", py_dims);
> In the Python code, I want to just print that array:
> def f(self, dims):
> print ("np array:%d,%d"%(dims,dims))
> But it only prints the first number correctly, i.e., dims. The second
> number is always 0.
The correct typecode would be NPY_INTP.
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