execfile tip added

[JLammering]

it was said in the lesson but was missing in the script and I find it really useful

[chrisburr]

@JLammering Thanks for the PR, I'm just checking with one of the ganga developers if this is the recommended method of doing this or if it should it be done the other way I know.

@mesmith75 Is there a preference between using execfile(my_submission_script.py) and %ganga my_submission_script.py?

[mesmith75]

So I don't think execfile runs things in the background. It just executes the python in the file. What you really need is to teach them about the queues.

[alexpearce]

I think the nice thing about executing a job creation script is that the job creation is encapsulated in a script which can be easily re-run, rather than being done interactively. So, I would re-frame the bullet point to highlight that.

I don't think having this happen in the background is relevant (not that it does with execfile or %ganga).