TChain::GetTreeOffset() returns None?

Dear experts,
I’m trying to use TChian and TEntryList in pyroot. I get a warning when I call GetTreeOffset():

And the return value is None. What’s the correct way of calling this function? Thanks.

Regards,
Dongliang

Dongliang,

can’t: an executor first needs to be written. Python has no array of long long’s in module array, that’s why it doesn’t exist …

Don’t really have a solution other than writing a C++ helper for indexing.

Cheers,
Wim

Dear Wim,
I see. Thanks a lot for the clarification.
Dongliang