组合框QGroupBox

样式：

注意:内部必须使用布局控件

 import sys
 from PyQt5.QtCore import Qt
 from PyQt5.QtGui import QPixmap
 from PyQt5.QtWidgets import QApplication, QWidget, QGroupBox, QRadioButton, QLabel, QHBoxLayout, QVBoxLayout

 class Demo(QWidget):
     def __init__(self):
         super(Demo, self).__init__()
         self.groupbox_1 = QGroupBox('On and Off', self)  # 实例化组合框
         self.groupbox_2 = QGroupBox('Change Color', self)

         self.red = QRadioButton('Red', self)
         self.blue = QRadioButton('Blue', self)
         self.green = QRadioButton('Green', self)
         self.yellow = QRadioButton('Yellow', self)
         self.color_list = [self.red, self.blue, self.green, self.yellow]

         self.on = QRadioButton('On', self)
         self.off = QRadioButton('Off', self)

         self.pic_label = QLabel(self)  

         self.h1_layout = QHBoxLayout()
         self.h2_layout = QHBoxLayout()
         self.h3_layout = QHBoxLayout()
         self.all_v_layout = QVBoxLayout()

         self.layout_init()
         self.radiobutton_init()
         self.label_init()

     def layout_init(self):
         self.h1_layout.addWidget(self.on)
         self.h1_layout.addWidget(self.off)
         self.groupbox_1.setLayout(self.h1_layout)  #组合框中添加布局

         self.h2_layout.addWidget(self.red)
         self.h2_layout.addWidget(self.blue)
         self.h2_layout.addWidget(self.green)
         self.h2_layout.addWidget(self.yellow)
         self.groupbox_2.setLayout(self.h2_layout)

         self.h3_layout.addWidget(self.groupbox_1)
         self.h3_layout.addWidget(self.groupbox_2)

         self.all_v_layout.addWidget(self.pic_label)
         self.all_v_layout.addLayout(self.h3_layout)

         self.setLayout(self.all_v_layout)

     def radiobutton_init(self):
         self.yellow.setChecked(True)
         for btn in self.color_list:
             btn.clicked.connect(self.change_color_func)

         self.off.setChecked(True)
         self.off.toggled.connect(self.on_and_off_func)

     def label_init(self):
         self.pic_label.setPixmap(QPixmap('images/Off.png'))
         self.pic_label.setAlignment(Qt.AlignCenter)

     def change_color_func(self):
         if self.on.isChecked():
             path = 'images/{}.png'.format([btn.text() for btn in self.color_list if btn.isChecked()][0])
             self.pic_label.setPixmap(QPixmap(path))

     def on_and_off_func(self):
         if self.on.isChecked():
             path = 'images/{}.png'.format([btn.text() for btn in self.color_list if btn.isChecked()][0])
             self.pic_label.setPixmap(QPixmap(path))
         else:
             self.pic_label.setPixmap(QPixmap('images/Off.png'))

 if __name__ == '__main__':
     app = QApplication(sys.argv)
     demo = Demo()
     demo.show()
     sys.exit(app.exec_())