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import sys

from PyQt5.QtCore import *

from PyQt5.QtGui import *

from PyQt5.QtWidgets import *

class ComboxDemo(QWidget):

    def __init__(self, parent=None):

        super(ComboxDemo, self).__init__(parent)

        self.setWindowTitle("combox 例子")

        self.resize(300, 90)

        layout = QVBoxLayout()

        self.lbl = QLabel("")

        self.cb = QComboBox()

        self.cb.addItem("C")

        self.cb.addItem("C++")

        self.cb.addItems(["Java", "C#", "Python"])

        self.cb.currentIndexChanged.connect(self.selectionchange)

        layout.addWidget(self.cb)

        layout.addWidget(self.lbl)

        self.setLayout(layout)

    def selectionchange(self, i):

        self.lbl.setText(self.cb.currentText())

        self.lbl.adjustSize()

        print("Items in the list are :")

        for count in range(self.cb.count()):

            print('item' + str(count) + '=' + self.cb.itemText(count))#每个选项名称

            print("Current index", i, "selection changed ", self.cb.currentText())#当前选项

if __name__ == '__main__':

    app = QApplication(sys.argv)

    comboxDemo = ComboxDemo()

    comboxDemo.show()

    sys.exit(app.exec_())

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from PyQt5.QtWidgets import QComboBox, QListWidgetItem, QListWidget, QCheckBox, \

  QApplication, QVBoxLayout, QWidget,QPushButton,QHBoxLayout,QLineEdit

import sys

class ComboCheckBox(QWidget):

  def __init__(self, parent=None):

        super(ComboCheckBox, self).__init__(parent)

        self.items = ['语文', '数学', '英语', '体育']

        self.box_list = []

        self.comb = QComboBox(self) #列表框QComboBox

        self.listwidget = QListWidget(self) #（列表控件）

        for i in range(len(self.items)):

            self.box_list.append(QCheckBox(self))

            self.box_list[i].setText(self.items[i])

            item = QListWidgetItem(self.listwidget)

            self.listwidget.setItemWidget(item, self.box_list[i])

            # QComboBox添加模型和视图,QListWidget设置为QComboBox的View，QListWidget的Model设置为QComboBox的Model

        self.comb.setModel(self.listwidget.model())

        self.comb.setView(self.listwidget)

        self.btn = QPushButton('选择', self)

        self.btn.clicked.connect(self.get_selected)

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