Pass numeric arrays from C extensions to Python

[JBT]

Hi,

I am looking for a way to pass numeric arrays, such as *float a[100]; double b[200];*, from C extension codes to python. The use case of this problem is that you have data stored in a particular format, NASA common data format (CDF) in my case, and there exists an official C library to read/create/edit such data, and you want to do data analysis in python. The problem comes down to how to feed the data into python.

I did some googling, but so far no luck. Can anyone help me? Thank you verymuch.

Cheers,
JBT

 

[Terry Reedy]

Hi,

I am looking for a way to pass numeric arrays, such as *float a[100];
double b[200];*, from C extension codes to python. The use case of
this problem is that you have data stored in a particular format,
NASA common data format (CDF) in my case, and there exists an
official C library to read/create/edit such data, and you want to do
data analysis in python. The problem comes down to how to feed the
data into python.

I did some googling, but so far no luck. Can anyone help me? Thank
you very much.

I would look into numpy and scipy.

 

[Grant Edwards]

I am looking for a way to pass numeric arrays, such as *float a[100];
double b[200];*, from C extension codes to python. The use case of
this problem is that you have data stored in a particular format,
NASA common data format (CDF) in my case, and there exists an
official C library to read/create/edit such data, and you want to do
data analysis in python. The problem comes down to how to feed the
data into python.

In a addition to scipy and scientific python (two different projects),
you should probably take a look at the struct module and the ctypes
module.