Initial environment variable for batch options, simply appends to existing list

[gdevenyi]

This really should override the existing list, but this is currently unsupported in argparse

Only documentation I could find provides example code that doesn't work (anymore?)

[pipitone]

Could you write a custom action to deal with this?

[pipitone]

i.e. action checks that if appending to the default list, just replace it, otherwise append

[gdevenyi]

That's the idea, but my python-fu isn't strong enough to do it.

[pipitone]

Check out PR #83. I create an int subclass to mark default values. You could do the same with lists. It's not perfect, but it works.

[gdevenyi]

Hrm. I was thinking of replacing the argparse handler as per various discussions around. This probably much more doable.

[gdevenyi]

Should be handled via #85