How many Trees are in a root file?

Newbie
,
2

Hi,

you can loop on the keys holding objects stored in a ROOT files and get their type name, e.g. “TTree” as follows:

for (auto&& keyAsObj : file->GetListOfKeys()){
 auto key = (TKey*) keyAsObj;
 cout << key->GetName() << " " << key->GetClassName() << endl;
}

if it is enough for you, you can achieve this with a command line utility, rootls

rootls myfile.root

Cheers,
D