Python Prompt Toolkit 3.0¶
Notice that this is the prompt_toolkit 3.0 documentation. It is mostly compatible with the 2.0 branch. The difference is that prompt_toolkit 3.0 requires at least Python 3.6. On the plus side, it uses asyncio natively (rather than it’s own event loop), and we have type annotations everywhere.
prompt_toolkit is a library for building powerful interactive command line and terminal applications in Python.
It can be a very advanced pure Python replacement for GNU readline, but it can also be used for building full screen applications.
Syntax highlighting of the input while typing. (For instance, with a Pygments lexer.)
Multi-line input editing.
Advanced code completion.
Selecting text for copy/paste. (Both Emacs and Vi style.)
Mouse support for cursor positioning and scrolling.
Auto suggestions. (Like fish shell.)
No global state.
Both Emacs and Vi key bindings.
Reverse and forward incremental search.
Works well with Unicode double width characters. (Chinese input.)
Pure Python. Runs on all Python versions starting at Python 3.6. (Python 2.6 - 3.x is supported in prompt_toolkit 2.0; not 3.0).
Runs on Linux, OS X, OpenBSD and Windows systems.
Lightweight, the only dependencies are Pygments and wcwidth.
No assumptions about I/O are made. Every prompt_toolkit application should also run in a telnet/ssh server or an asyncio process.
Have a look at the gallery to get an idea of what is possible.
A special thanks to all the contributors for making prompt_toolkit possible.
Table of contents¶
- Getting started
- Printing (and using) formatted text
- Asking for input (prompts)
- Hello world
- The PromptSession object
- Syntax highlighting
- Input validation
- Auto suggestion
- Adding a bottom toolbar
- Adding a right prompt
- Vi input mode
- Adding custom key bindings
- Other prompt options
- Prompt in an asyncio application
- Reading keys from stdin, one key at a time, but without a prompt
- Progress bars
- Building full screen applications
- Advanced topics