Repeatable option with csv arguments

[Fung-Chai]

How do I get a repeatable option with cvs argument to return a list of the individual values? I think an example is needed to clarify what I mean. I want -n 1,2 -n 3 -n 4,5,6 to return [1, 2, 3, 4, 5, 6].

In my code, I set multiple=True and type=subclass of ParamType that calls split(','). But for the above command-line example, I got [[1,2], [3], [4,5,6]]

Any suggestion? Thanks in advance.

[jules43]

I'm not sure there's a built in way to do this, could you just flatten the list of lists before you use it?

ie

flat_opt_list = [opt for opt_list in list_of_lists for opt in opt_list]