基本操作

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

class InputdialogDemo(QWidget):
    def __init__(self, parent=None):
        super(InputdialogDemo, self).__init__(parent)
        layout = QFormLayout()
        self.btn1 = QPushButton("获得列表里的选项")
        self.btn1.clicked.connect(self.getItem)
        self.le1 = QLineEdit()
        layout.addRow(self.btn1,self.le1)

        self.btn2 = QPushButton("获得字符串")
        self.btn2.clicked.connect(self.getIext)
        self.le2 = QLineEdit()
        layout.addRow(self.btn2,self.le2)

        self.btn3 = QPushButton("获得整数")
        self.btn3.clicked.connect(self.getInt)
        self.le3 = QLineEdit()
        layout.addRow(self.btn3,self.le3)
        self.setLayout(layout)
        self.setWindowTitle("Input Dialog 例子")

    def getItem(self):
        items = ("C", "C++", "Java", "Python")
        item, ok = QInputDialog.getItem(self, "select input dialog",
        "语言列表", items, 0, False)
        if ok and item:
            self.le1.setText(item)

    def getIext(self): 
        text, ok = QInputDialog.getText(self, 'Text Input Dialog', '输入姓名:')
        if ok:
            self.le2.setText(str(text)) 

    def getInt(self):
        num,ok = QInputDialog.getInt(self,"integer input dualog","输入数字")
        if ok:
            self.le3.setText(str(num))

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