export an array of floats to python

[Travis Oliphant]

Peter Wuertz wrote:
> Hi,
> 
> I'm writing a C module for python, that accesses a special usb camera. 
> This module is supposed to provide python with data (alot of data). Then 
> SciPy is used to fit the data.
>

Which version of scipy are you using?


> My question is, how to make python read from a C array? By reading the 
> documentation, one could get the impression that PyBufferObjects do that 
> job.
> 
> http://docs.python.org/api/bufferObjects.html
> 
> It says:
> "Two examples of objects that support the buffer interface are strings 
> and arrays."
> 
> Where this function looks promising:
> "PyBuffer_FromMemory - Return a new read-only buffer object that reads 
> from a specified location in memory, with a specified size."
> 
> All right, lets imagine I created a PyBufferObject from my float array 
> in the C module, and passed it to python.

How about creating an array directly from your float array using 
PyArray_SimpleNewFromData (the NumPy C-API) or PyArray_FromDimsAndData 
(the Numeric C-API).


-Travis