How to use TPyBufferFactory from python

[etejedor]

Hi @ynikitenko, can you try what is suggested here:

Store 2D array into TTree use python

Dear zhangaw325, Here is an example of how to store a 2D array in a TTree from Python. For the sake of illustrating the different options you have, one of the dimensions is a variable that corresponds to another branch of the tree, the other dimension is defined with a constant. Numpy is used to construct the multidimensional arrays in Python. Here is the code that stores the array: from ROOT import TFile, TTree import numpy as np f = TFile('example.root', 'recreate') t = TTree('mytree', 'ex…

In that example, there was a 2D array of doubles that was read back into Python and reconverted with np.reshape.

Enric