Argcomplete provides easy, extensible command line tab completion of
arguments for your Python script.
It makes two assumptions:
* You are using bash as your shell
* You are using argparse to manage your command line arguments/options
Argcomplete is particularly useful if your program has lots of
options or subparsers, and if your program can dynamically suggest
completions for your argument/option values (for example, if the user
is browsing resources over the network).
Python 3 version.
