line number variable?

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Is there any way, either in Python or in AAP syntax, to get the recipe line
number?  I would like to write some code like:

@for location in location_list:
@  if os.path.isfile(location):
~     var = $location
@assert hasattr(_no, 'var'), "var was !set at line %s of setup.aap"%_no.LINENO


While we're at it, is there any way to find out what the name of the current
recipe is?

Thanks,

C
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