PyQt5 QRadioButton

单选按钮具有圆形形状，用于从多个选项中选择一个选项。该按钮在圆圈被填充时处于选中状态，在圆圈为空心时取消选中。 QRadioButton 类用于在应用程序中添加单选按钮。

例子：
要求用户选择用户性别的窗口。根据用户的选择，它会显示一条消息：“您是男性/女性”，如果用户更改他/她的选择，该消息将发生变化。
下面是代码：

Python3

import sys
from PyQt5 import QtCore, QtGui, QtWidgets
 
class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(466, 299)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
         
        # Radio button for male
        self.radioButton_male = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_male.setGeometry(QtCore.QRect(180, 120, 95, 20))
 
        # adding signal and slot
        self.radioButton_male.toggled.connect(self.maleselected)
        
        # Radio button for female
        self.radioButton_female = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_female.setGeometry(QtCore.QRect(180, 150, 95, 20))
 
        # adding signal and slot
        self.radioButton_female.toggled.connect(self.femaleselected)
         
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(170, 90, 211, 20))
        MainWindow.setCentralWidget(self.centralwidget)
 
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
     
    def maleselected(self, selected):
        if selected:
            self.label.setText("You are male")
             
    def femaleselected(self, selected):
        if selected:
            self.label.setText("You are female")       
             
    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
 
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.radioButton_male.setText(_translate("MainWindow", "Male"))
        self.label.setText(_translate("MainWindow", "Select your gender:"))
        self.radioButton_female.setText(_translate("MainWindow", "Female"))
 
# Driver Code
if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
   
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

输出：

根据用户的选择，会出现一条消息“您是男性”或“您是女性”，并且会随着用户更改他/她的选择而改变。