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I have a script which is to be used like this: usage:installer.py dir [-h] [-v]

Here, dir is a positional argument that is defined as:

parser.add_argument('dir', default=os.getcwd())

 I want to make dir optional I.e, it should be cwd when it is not specified.

 But, the problem is when I don’t specify the dir argument it gives this error:

Error: Too few arguments.

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