**Course Title:** PyQt6 Application Development **Section Title:** Integrating Databases with PyQt6 **Topic:** Displaying database data in views like QTableView In this topic, we'll explore how to display database data in views like QTableView, which is a table view widget that displays data in a table format. We'll learn how to connect a QSqlTableModel to a QTableView and display the database data. ### Introduction to QTableView QTableView is a table view widget that displays data in a table format. It is a part of the PyQt6 framework and can be used to display data from a database. The QTableView widget provides several features, such as: * Support for scrolling and resizing * Ability to display data in multiple columns * Support for sorting and filtering data ### Displaying Database Data in QTableView To display database data in QTableView, we need to follow these steps: * Create a QSqlTableModel object and connect it to the database * Set the table name and the database connection * Create a QTableView object and set the model * Show the view Here is an example code to display database data in QTableView: ```python import sys from PyQt6.QtWidgets import QApplication, QTableView from PyQt6.QtSql import QSqlDatabase, QSqlTableModel # Create a database connection db = QSqlDatabase.addDatabase('QSQLITE') db.setDatabaseName('example.db') db.open() # Create a QSqlTableModel object model = QSqlTableModel(parent=None, db=db) model.setTable('example') model.select() # Create a QTableView object and set the model view = QTableView() view.setModel(model) view.show() if __name__ == '__main__': app = QApplication(sys.argv) sys.exit(app.exec()) ``` ### Customizing the QTableView The QTableView class provides several options for customizing its appearance and behavior. We can use the following methods to customize the QTableView: * `setSelectionMode()`: Sets the selection mode for the view * `setSortingEnabled()`: Enables or disables sorting for the view * `setColumnWidth()`: Sets the width of a column * `setColumnHidden()`: Hides or shows a column Here is an example code that customizes the QTableView: ```python import sys from PyQt6.QtWidgets import QApplication, QTableView from PyQt6.QtSql import QSqlDatabase, QSqlTableModel # Create a database connection db = QSqlDatabase.addDatabase('QSQLITE') db.setDatabaseName('example.db') db.open() # Create a QSqlTableModel object model = QSqlTableModel(parent=None, db=db) model.setTable('example') model.select() # Create a QTableView object and set the model view = QTableView() view.setModel(model) view.setSelectionMode(QTableView.SelectionMode.SingleSelection) view.setSortingEnabled(True) view.setColumnWidth(0, 200) view.setColumnHidden(1, True) view.show() if __name__ == '__main__': app = QApplication(sys.argv) sys.exit(app.exec()) ``` ### Practical Application In a real-world application, we can use the QTableView to display data from a database. For example, we can create a contact list application that displays a list of contacts in a QTableView. We can also add features, such as sorting and filtering, to make the application more user-friendly. ### Conclusion In this topic, we learned how to display database data in views like QTableView. We explored the QTableView class and learned how to customize its appearance and behavior. We also learned how to create a QSqlTableModel and connect it to the database. With this knowledge, we can create robust and user-friendly applications that display data from a database. If you have any questions or need help with a specific problem, feel free to leave a comment. In the next topic, we'll explore **Introduction to Multithreading in PyQt6**. References: * [PyQt6 Documentation: QTableView](https://doc.qt.io/qtforpython-6/PyQt6/QtWidgets/QTableView.html) * [PyQt6 Documentation: QSqlTableModel](https://doc.qt.io/qtforpython-6/PyQt6/QtSql/QSqlTableModel.html) * [Qt for Python: QSqlDatabase](https://doc.qt.io/qtforpython-6/PyQt6/QtSql/QSqlDatabase.html)