Python argparse: Force a list item to be unique

Question

Being able to validate the list items using choices=servers below is nice.

servers = [ \"ApaServer\", \"BananServer\", \"GulServer\", \"SolServ         


        

Answer 1

Modifying Michel's answer:

In [1]: x = [5,6,5]

In [2]: x_nodups = list(set(x))

In [3]: x_nodups
Out[3]: [5, 6]

In [4]: x_nodups_michel = dict(map(lambda i: (i,1),x)).keys()

In [5]: x_nodups_michel
Out[5]: [5, 6]

Much shorter.