Reading values of branches with dots in names

[lkildetoft]

Hi! I'm having trouble reading leaves of branches with uproot, where the branch names contain dots.
For example in my ROOT file, I have the branch "EventInfoAux.", which contains a leaf "eventNumber".
Normally I would access this with something like:
file["tree/EventInfoAux.eventNumber"]

However, this is not possible as it results in
file["tree/EventInfoAux..eventNumber"]

which uproot doesn't understand. Is there an easy solution to this?
Thanks!

[tamasgal]

Can you show more output from that file and also the error message? What is e.g. file["tree"].keys()?

[jpivarski]

Uproot doesn't do any special interpretation of the dots (.), though it does parse by slashes (/). ROOT inserts dots in branch names according to its C++ object-splitting rules and Uproot takes a hands-off approach to them.

You can check to see if this string is exactly what you get from TTree.keys, possibly with recursive=False to narrow in.

It's also possible for ROOT to make a file with non-unique branch names. Uproot will pick the first that matches, at each level of hierarchy, if that's relevant. In this case, you need to select them by integer index. You can reverse-index them with TBranch.index (to find out which index to pass).