Tkinterttk

tkinter.ttk (often called ttk) is a submodule of Python's standard library Tkinter that provides a set of themed widgets built on top of the Tcl/Tk toolkit. The goal is to offer a modern, cross-platform look by using platform-native themes while preserving the Tcl/Tk widget API. The themed widgets are designed to replace or complement the classic Tkinter widgets and to provide a more consistent appearance across operating systems.

Commonly used widgets include Button, Label, Entry, Checkbutton, Radiobutton, Combobox, Spinbox, Progressbar, Scale, Treeview, Notebook, PanedWindow, Separator, and Sizegrip. These widgets share a unified styling mechanism and often behave slightly differently from their classic counterparts.

The appearance is controlled by a styling system based on the Style class. A ttk.Style instance selects a theme (for example, 'clam', 'default', 'alt', 'classic', with platform-specific themes such as 'vista' on Windows) and configures widget options via named styles like 'TButton' or 'TLabel'. This enables consistent colors, borders, and typography without changing application logic.

Usage is similar to standard Tkinter, but with widget classes prefixed by ttk, e.g., ttk.Button, ttk.Label, ttk.Treeview. Theming can be changed at runtime, and some widgets expose additional options unique to ttk.

Tkinter.ttk enhances visual consistency and responsiveness on different platforms, but it may require explicit styling for a custom appearance. It is part of Python's standard library and requires no external dependencies.