Creating TDirs in a rootfile via a cycle

[gpadovan]

Hi,
I am using pyroot and I want to:

• open an output file
• on a loop: open a TDirectory with a name defined in the loop, write in it
• save the file

All the TDris have to be at the same level, in the file.

Can you send me a scratch of code to do this? I am doing:

outfile = ROOT.TFile(outputdir + folder.split("/")[-1],"RECREATE")
for basename in basenames:
    TDir = ROOT.TDirectory(basename, "")
    TDir.Write()
outfile.Write()
outfile.Close()

but I in the end do not see the TDirs in the file. Am I doing something wrong?

Thanks, Giovanni

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ROOT Version: 6.24/08

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[pcanal]

You meant:

outfile = ROOT.TFile(outputdir + folder.split("/")[-1],"RECREATE")
for basename in basenames:
    TDir = outfile.mkdir(basename)
outfile.Write()
outfile.Close()