계산기

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout, QLineEdit


class MyApp(QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.qle = QLineEdit(self)
        self.qle.setText("0")

        btn1 = QPushButton(self)
        btn1.setText('0')
        btn1.clicked(self.function(0))

        btn2 = QPushButton(self)
        btn2.setText('1')
        btn2.clicked(self.function(1))

        btn3 = QPushButton(self)
        btn3.setText('2')
        btn3.clicked(self.function1(2))

        btn4 = QPushButton(self)
        btn4.setText('3')
        btn4.clicked(self.function(3))

        btn5 = QPushButton(self)
        btn5.setText('4')
        btn5.clicked(self.function(4))

        btn6 = QPushButton(self)
        btn6.setText('5')
        btn6.clicked(self.function(5))

        btn7 = QPushButton(self)
        btn7.setText('6')
        btn7.clicked(self.function1(6))

        btn8 = QPushButton(self)
        btn8.setText('7')
        btn8.clicked(self.fuction(7))

        btn9 = QPushButton(self)
        btn9.setText('8')
        btn9.clicked(self.function1(8))

        btn10 = QPushButton(self)
        btn10.setText('9')
        btn10.clicked(self.function(9))

        btn11 = QPushButton(self)
        btn11.setText('X')
        btn11.clicked(self.function('X'))

        btn12 = QPushButton(self)
        btn12.setText('-')
        btn12.clicked(self.function1('-'))

        btn13 = QPushButton(self)
        btn13.setText('+')
        btn13.clicked(self.function('+'))

        btn14 = QPushButton(self)
        btn14.setText('C')
        btn14.clicked(self.C)

        btn15 = QPushButton(self)
        btn15.setText('back')
        btn15.clicked(self.Back)

        vbox = QVBoxLayout()
        vbox.addWidget(self.qle)
        vbox.addWidget(btn1)
        vbox.addWidget(btn3)
        vbox.addWidget(btn2)

        self.setLayout(vbox)
        self.setWindowTitle('QPushButton')
        self.setGeometry(300, 300, 300, 200)
        self.show()

        btn1 = QPushButton('&Button1', self)
        btn1.setCheckable(True)
        btn1.clicked.connect(self.hello)
        btn1.toggle()

        btn3 = QPushButton('&Button3', self)
        btn3.setCheckable(True)
        btn3.clicked.connect(self.world)
        btn3.toggle()

        btn2 = QPushButton('&Button1', self)
        btn2.setCheckable(True)
        btn2.clicked.connect(self.view)
        btn2.toggle()

    def C(self):
        self.qle = 0

    def function(self, num):



    def hello(self):
        number = 1
        v = int(self.qle.text())
        self.qle.setText(str(v * 10 + number))

    def world(self):
        number = 2
        v = int(self.qle.text())
        self.qle.setText(str(v * 10 + number))

    def view(self):
        print(self.number)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MyApp()
    sys.exit(app.exec_())