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```console
$ 03_05_default_values --help
A simple to use, efficient, and full-featured Command Line Argument Parser
Usage: 03_05_default_values[EXE] [PORT]
Arguments:
[PORT] [default: 2020]
Options:
-h, --help Print help
-V, --version Print version
$ 03_05_default_values
port: 2020
$ 03_05_default_values 22
port: 22
```
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