Default VarParsing options in runGEMUnpacker_cfg.py do not work

[makortel]

I noticed in #45640 (comment) the VarParsing defaults in

cmssw/EventFilter/GEMRawToDigi/test/runGEMUnpacker_cfg.py

Lines 67 to 71 in 3242ef3

	options.register('feds',
	[1467,1468],
	VarParsing.VarParsing.multiplicity.list,
	VarParsing.VarParsing.varType.int,
	"List of FEDs")

do not work, because (given how VarParsing, unfortunately, works) they result in a list of lists [[1467, 1468]] that then results an error

TypeError: wrong types (<class 'list'>) added to <class 'FWCore.ParameterSet.Types.vint32'>

Presently there is no intention to improve VarParsing behavior in this regards (see rationale in #45961 (comment) and #45640 (comment)). Our recommendation would be switch to standard python argparse. If that is not feasible, and if the aforementioned behavior is important, the configuration file should handle this case by itself.

[makortel]

assign EventFilter/GEMRawToDigi

[cmsbuild]

New categories assigned: reconstruction

@jfernan2,@mandrenguyen you have been requested to review this Pull request/Issue and eventually sign? Thanks

[cmsbuild]

cms-bot internal usage

[cmsbuild]

A new Issue was created by @makortel.

@Dr15Jones, @antoniovilela, @makortel, @mandrenguyen, @rappoccio, @sextonkennedy, @smuzaffar can you please review it and eventually sign/assign? Thanks.

cms-bot commands are listed here

[jfernan2]

FYI @jshlee @dildick