shtab 1.7.0

Automagic shell tab completion for Python CLI applications

shtab

• What: Automatically generate shell tab completion scripts for Python CLI apps

• Why: Speed & correctness. Alternatives like argcomplete and pyzshcomplete are slow and have side-effects

• How: shtab processes an argparse.ArgumentParser object to generate a tab completion script for your shell

Features

• Outputs tab completion scripts for

  • bash

  • zsh

  • tcsh

• Supports

  • argparse

  • docopt (via argopt)

• Supports arguments, options and subparsers

• Supports choices (e.g. --say={hello,goodbye})

• Supports file and directory path completion

• Supports custom path completion (e.g. --file={*.txt})

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Table of Contents

• shtab

  • Features

  • Installation

  • Usage

  • Examples

  • FAQs

  • Alternatives

  • Contributions

Installation

Choose one of:

• pip install shtab, or

• conda install -c conda-forge shtab

See operating system-specific instructions in the docs.

Usage

There are two ways of using shtab:

• CLI Usage: shtab’s own CLI interface for external applications

  • may not require any code modifications whatsoever

  • end-users execute shtab your_cli_app.your_parser_object

• Library Usage: as a library integrated into your CLI application

  • adds a couple of lines to your application

  • argument mode: end-users execute your_cli_app --print-completion {bash,zsh,tcsh}

  • subparser mode: end-users execute your_cli_app completion {bash,zsh,tcsh}

Examples

See the docs for usage examples.

FAQs

Not working? Check out frequently asked questions.

Alternatives

• argcomplete

  • executes the underlying script every time <TAB> is pressed (slow and has side-effects)

  • only provides bash completion

• pyzshcomplete

  • executes the underlying script every time <TAB> is pressed (slow and has side-effects)

  • only provides zsh completion

• click

  • different framework completely replacing the builtin argparse

  • solves multiple problems (rather than POSIX-style “do one thing well”)

Contributions

Please do open issues & pull requests! Some ideas:

• support fish

• support powershell

See CONTRIBUTING.md for more guidance.