**prompt_toolkit** is a Python library for building powerful interactive command-line and terminal applications. It was created by Jonathan Slenders and is maintained under the prompt-toolkit GitHub organization. ## What it does It can serve as a very advanced, pure-Python replacement for GNU readline, but it can also be used to build full-screen terminal applications. It's the engine behind tools like **ptpython** (an enhanced Python REPL), **pyvim** (a Vim clone), and **pymux** (a tmux-like multiplexer). ## Key features - **Syntax highlighting** of input while typing (e.g., via a Pygments lexer) - **Multi-line input editing** - **Advanced code completion** - **Both Emacs and Vi key bindings** (including advanced Vi features like named registers and digraphs) - **Reverse and forward incremental search** - **Auto suggestions** (like the fish shell) - **Mouse support** for cursor positioning and scrolling - **Text selection for copy/paste** (Emacs and Vi style) - **Multiple input buffers** and **no global state** - **Unicode double-width character support** (Chinese input) - **Cross-platform**: runs on Linux, macOS, FreeBSD, OpenBSD, and Windows ## Technical details - **Pure Python**, works on Python 3.6+ (prompt_toolkit 3.0) - **Lightweight** — the only dependencies are Pygments and wcwidth - **No assumptions about I/O** — applications can run in a telnet/SSH server or an asyncio process - Licensed under **BSD-3-Clause** - ~10.6k stars on GitHub ## Simple example ```python from prompt_toolkit import prompt if __name__ == '__main__': answer = prompt('Give me some input: ') print('You said: %s' % answer) ``` ## Installation ```bash pip install prompt_toolkit # or with conda conda install -c conda-forge prompt_toolkit ``` Sources: - [Official documentation (Python Prompt Toolkit 3.0)](https://python-prompt-toolkit.readthedocs.io/en/master/) - [GitHub repository](https://github.com/prompt-toolkit/python-prompt-toolkit) - [prompt_toolkit on PyPI](https://pypi.org/project/prompt_toolkit/)