在pyqt5中使用按钮在选项卡之间切换

from PyQt5.QtWidgets import QApplication, QMainWindow, QTabWidget, QWidget, QVBoxLayout, QPushButton

app = QApplication([])
window = QMainWindow()
tab_widget = QTabWidget()

page1 = QWidget()
page2 = QWidget()
tab_widget.addTab(page1, "选项卡1")
tab_widget.addTab(page2, "选项卡2")

button1 = QPushButton("切换到选项卡1")
button2 = QPushButton("切换到选项卡2")

def switch_to_page1():
    tab_widget.setCurrentIndex(0)

def switch_to_page2():
    tab_widget.setCurrentIndex(1)

button1.clicked.connect(switch_to_page1)
button2.clicked.connect(switch_to_page2)

layout1 = QVBoxLayout()
layout2 = QVBoxLayout()
layout1.addWidget(button1)
layout2.addWidget(button2)
page1.setLayout(layout1)
page2.setLayout(layout2)

window.setCentralWidget(tab_widget)
window.show()
app.exec_()