For developers seeking to create applications with terminal user
interfaces (TUIs), options have been relatively limited compared to the
vast number of graphical user interface (GUI) frameworks available. As a
result, many command-line applications reinvent the same user interface
elements. Textual aims to
remedy this: it’s a rapid-application-development framework for
Python TUI applications. Offering cross-platform support, Textual
incorporates layouts, CSS-like styles, and an expanding collection of
widgets.

Source: LWN.net – [$] Textual: a framework for terminal user interfaces