Memory preallocation in python

[Marek Wojciechowski]

>   1) It would have to be for a subclass like MatSeqAIJ
>
>   2) It is setPreallocation()
>
>   Thanks,
>
>      Matt
>

Honestly, I can find neither subclass MatSeqAIJ nor the method  
setPreallocation(). I create matrix as follows:

import PETSc.Mat
K = PETSc.Mat.Mat()   ## as far as i know this is the only way to create  
matrix in python
K.setSizes(size, size, Size, Size)
K.setFromOptions()
K.setType("seqaij")   ## i choose matrix type here, I don't know another  
way...

Where is the moment to preallocate?


-- 
Marek Wojciechowski