[Numpy-discussion] constructing an array from memory

Zachary Pincus zachary.pincus@yale....
Fri Sep 24 12:21:01 CDT 2010


> I'm trying to do something ... unusual.
>
> gdb support scripting with Python. From within my python script, I can
> get the address of a contiguous area of memory that stores a  fortran
> array. I want to creat a NumPy array using "frombuffer". I see that
> the CPython API supports the creation of a buffer, but, is there an
> easier, more direct, way?

Here's how I do a similar task:
numpy.ndarray(shape, dtype=dtype,  
buffer=(ctypes.c_char*size_in_bytes).from_address(address))

You may need the strides or order parameters, as well.

Perhaps there's an easier way to create a buffer from an integer  
memory address, but this seems pretty straightforward.

Zach


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