Due to limitations of file descriptor inheritance on Windows, Git Bash not supported out of the box. You can opt in to using temporary files instead of file descriptors for for IPC by setting the environment variable ARGCOMPLETE_USE_TEMPFILES, e.g. by adding export ARGCOMPLETE_USE_TEMPFILES=1 to ~/.bashrc.

For full support, consider using Bash with the Windows Subsystem for Linux (WSL).

To activate completions for fish use:

register-python-argcomplete --shell fish my-awesome-script | source

or create new completion file, e.g:

register-python-argcomplete --shell fish my-awesome-script > ~/.config/fish/completions/my-awesome-script.fish

By default help string is added as completion description.

You can disable this feature by removing _ARGCOMPLETE_DFS variable, e.g:

register-python-argcomplete --shell fish my-awesome-script | grep -v _ARGCOMPLETE_DFS | source

To activate completions for PowerShell use:

register-python-argcomplete --shell powershell my-awesome-script | Out-String | Invoke-Expression

or create new completion file, e.g:

register-python-argcomplete --shell powershell my-awesome-script > ~/my-awesome-script.psm1

To activate this completions file, add the below line in $PROFILE. The simplest way is to run notepad $PROFILE in PowerShell and edit the file. For more information, see How to create your profile and Profiles and execution policy.

Import-Module  "~/my-awesome-script.psm1"

The third-party xontrib-argcomplete project provides support for argcomplete in the xonsh shell.

To register an argcomplete script for an arbitrary name, the --external-argcomplete-script argument of the register-python-argcomplete script can be used:

eval "$(register-python-argcomplete --external-argcomplete-script /path/to/script arbitrary-name)"

This allows, for example, to use the auto completion functionality of argcomplete for an application not written in Python. The command line interface of this program must be additionally implemented in a Python script with argparse and argcomplete; whenever the application is called, the registered external argcomplete script is used for autocompletion.