I&#39;m trying to pass a list of arguments to a python script using the argh library.  Something that can take inputs like these:

    ./my_script.py my-func --argA blah --argB 1 2 3 4
    ./my_script.py my-func --argA blah --argB 1
    ./my_script.py my-func --argA blah --argB 

My internal code looks like this:

    import argh
    
    @argh.arg(&#39;--argA&#39;, default=&quot;bleh&quot;, help=&#39;My first arg&#39;)
    @argh.arg(&#39;--argB&#39;, default=[], help=&#39;A list-type arg--except it\&#39;s not!&#39;)
    def my_func(args):
        &quot;A function that does something&quot;
    
        print args.argA
        print args.argB
    
        for b in args.argB:
            print int(b)*int(b)  #Print the square of each number in the list
        print sum([int(b) for b in args.argB])  #Print the sum of the list
    
    p = argh.ArghParser()
    p.add_commands([my_func])
    p.dispatch()

And here&#39;s how it behaves:

    $ python temp.py my-func --argA blooh --argB 1
    blooh
    [&#39;1&#39;]
    1
    1
    
    $ python temp.py my-func --argA blooh --argB 10
    blooh
    [&#39;1&#39;, &#39;0&#39;]
    1
    0
    1
    
    $ python temp.py my-func --argA blooh --argB 1 2 3
    usage: temp.py [-h] {my-func} ...
    temp.py: error: unrecognized arguments: 2 3

The problem seems pretty straightforward: argh is only accepting the first argument, and treating it as a string.  How do I make it &quot;expect&quot; a list of integers instead?

I see [how this is done in optparse][1], but what about the (not-deprecated) argparse?  Or using argh&#39;s much nicer decorated syntax?  These seem much more pythonic.


  [1]: https://stackoverflow.com/questions/2086556/specifying-a-list-as-a-command-line-argument-in-python

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python argh/argparse: How can I pass a list as a command-line argument?