Introduction

Rich is a Python library for writing rich text (with color and style) to the terminal, and for displaying advanced content such as tables, markdown, and syntax highlighted code.

Use Rich to make your command line applications visually appealing and present data in a more readable way. Rich can also be a useful debugging aid by pretty printing and syntax highlighting data structures.

Requirements

Rich works with OSX, Linux and Windows.

On Windows both the (ancient) cmd.exe terminal is supported and the new Windows Terminal. The later has much improved support for color and style.

Rich requires Python 3.6.1 and above. Note that Python 3.6.0 is not supported due to lack of support for methods on NamedTuples.

Note

PyCharm users will need to enable “emulate terminal” in output console option in run/debug configuration to see styled output.

Installation

You can install Rich with from PyPi with pip or your favorite package manager:

pip install rich

Add the -U switch to update to the current version, if Rich is already installed.

If you intend to use Rich with Jupyter then there are some additional dependencies which you can install with the following command:

pip install rich[jupyter]

Quick Start

The quickest way to get up and running with Rich is to import the alternative print function which may be used as a drop-in replacement for Python’s built in function. Here’s how you would do that:

from rich import print

You can then print strings or objects to the terminal in the usual way. Rich will do some basic syntax highlighting and format data structures to make them easier to read.

Strings may contain Console Markup which can be used to insert color and styles in to the output.

The following demonstrates both console markup and pretty formatting of Python objects:

>>> print("[italic red]Hello[/italic red] World!", locals())

This writes the following output to the terminal (including all the colors and styles):

Hello World!
{
    '__annotations__': {},
    '__builtins__': <module 'builtins' (built-in)>,
    '__doc__': None,
    '__loader__': <class '_frozen_importlib.BuiltinImporter'>,
    '__name__': '__main__',
    '__package__': None,
    '__spec__': None,
    'print': <function print at 0x1027fd4c0>,
} 

If you would rather not shadow Python’s builtin print, you can import rich.print as rprint (for example):

from rich import print as rprint

Continue reading to learn about the more advanced features of Rich.

Python in the REPL

Rich may be installed in the REPL so that Python data structures are automatically pretty printed with syntax highlighting. Here’s how:

>>> from rich import pretty
>>> pretty.install()
>>> ["Rich and pretty", True]

You can also use this feature to try out Rich renderables. Here’s an example:

>>> from rich.panel import Panel
>>> Panel.fit("[bold yellow]Hi, I'm a Panel", border_style="red")

Read on to learn more about Rich renderables.

Rich Inspector

Rich has an inspect() function which can generate a report on any Python object. It is a fantastic debug aid, and a good example of the output that Rich can generate. Here is a simple example:

>>> from rich import inspect
>>> from rich.color import Color
>>> color = Color.parse("red")
>>> inspect(color, methods=True)