What is the use of the QTreeView class in PyQt5?

The QTreeView class in PyQt5 is a widget used to display tree-structured data. It can show a hierarchical data structure where users can expand or collapse nodes to view or hide child nodes, as well as interact by dragging and selecting nodes. QTreeView can be used to display hierarchical data such as file systems, directory structures, and data relationships. By setting different models and proxy classes, the appearance and behavior of the tree view can be customized.