Using PROOF in iPython notebook

ROOT
1

Dear experts,

I’ve been trying to work with PROOF in iPython notebooks via the TPySelector class. The code (basically the example from the ROOT documentation) works fine if I execute it via the terminal. However, I what i’d like to do is run the selector via an iPython notebook, i.e. the following:

  1. Define a selector in the notebook (and not in a separate .py file)
  2. Run the newly defined selector/analysis from the same notebook

In the regular .py script I submit the selector via

where ‘selector’ corresponds to the selector.py file that defines the selector class.

Is there any other way to pass a selector class to PROOF? Specifically, how could I tell the Process() function to take a class that is already defined in local namespace?

Many thanks for any pointers to this admittedly somewhat exotic question!

Philipp

2

Dear Philipp,

You can pass a TSelector object to PROOF in C++, I guess that can used here?
root.cern.ch/basic-processing#api

G Ganis

3

Seems that TPySelector exec’s an import statement. I’d trick it by adding an object to sys.modules, with the derived class as an attribute.

-Dom