traceback needed

[bhbraswell]

In utils function data_sources(), when the line repo = repository_class(key) throws an exception, all you see on the command line is a message that says your dataset is not a valid choice.

So I suspect this line:
VerboseOut(traceback.format_exc(), 4)

isn't doing what it is supposed to, which I think is to dump the trace to help with debugging.

[matthewhanson]

are you running with verbose = 4? It should dump the trace, if not it will just print the error message.

Anyway, overall the exception handling can be improved in this location and others.

[bhbraswell]

I am using -v4.