from PySide6 import QtWidgets
from PySide6.QtWidgets import QApplication, QMainWindow, QTableWidget, QTableWidgetItem, QVBoxLayout, QWidget
import sys

class MyWindow(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("表格内容自动占满一整行")

        central_widget = QWidget()
        self.setCentralWidget(central_widget)

        layout = QVBoxLayout(central_widget)

        self.table_widget = QTableWidget()
        layout.addWidget(self.table_widget)

        # 设置列数和行数
        self.table_widget.setColumnCount(3)
        self.table_widget.setRowCount(2)  # 两行

        # 设置伸展性
        self.table_widget.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Stretch)

        # 添加数据到表格中
        self.add_data_to_table()

    def add_data_to_table(self):
        data = [("数据1", "数据2", "数据3"),
                ("数据4", "数据5", "数据6")]

        for row, row_data in enumerate(data):
            for col, cell_data in enumerate(row_data):
                item = QTableWidgetItem(cell_data)
                self.table_widget.setItem(row, col, item)

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = MyWindow()
    window.setGeometry(100, 100, 600, 400)
    window.show()
    sys.exit(app.exec())