Re: mpeterv argparse -- get the last argument

[James Darnley <james.darnley@...>]

On 2016-10-26 12:35, Peter Melnichenko wrote:
> Hi James,
> 
> On Wed, Oct 26, 2016 at 1:18 AM, James Darnley <james.darnley@gmail.com> wrote:
>> I was trying to use mpeterv's argparse module
>> (https://github.com/mpeterv/argparse) to make a script behave somewhat
>> like `cp` or `mv` in that all arguments except the last one belong to
>> the "input".
>>
>> I tried, what I thought was the obvious:
>>> parser:argument("input"):args("+") -- at least 1 arg
>>> parser:argument("output"):args(1)  -- exactly 1 arg
>> but I just get "Error: missing argument 'output'" from it.
>>
>> Is there a way to have the module populate "output" for me?  Or should I
>> just do it myself by having the module read them all into "input" and
>> then removing the last one from the table?
> 
> argparse matches arguments greedily, so that in your example all arguments
> are considered `input` and then it raises an error as nothing is left for
> `output`. So, indeed, you have to split the last argument manually.
> 
> -- Best regards,
> -- Peter Melnichenko
> 

Okay.  Thank you for your input.  I did just that.  The help is no
longer as pretty but the script is mostly for my own use.

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