Opening ROOT command line in a python script

ROOT
#1

Hi, I have a python script that fills a bunch of histograms. I’d love to have the possibility to open a ROOT prompt, while I’m still executing the python script, to interact with the histograms, without the need of quit the script and opening a separate ROOT application.

I have tried using

ROOT.gApplication.Run(0)

but as result the script just stops, no errors or any other messages.

Any help is appreciated.

Thanks, Guido

#2

Hi,

that won’t work, but the opposite is possible: run the python script from CINT and drop back and forth between the two interpreters:[code]$ root
[0] TPython::Prompt()

execfile( “myscript.py” ) # or import or however you run it
^D
[1] // ROOT stuff here
…
[n] TPython::Prompt()

etc.[/code]

Note that state is preserved (i.e. the second call TPython::Prompt() has all the history etc. of the first call, as there is only one python interpreter for the duration of the program).

Cheers,
Wim