PyQt5蟒蛇计算器V2

上一个计算器实在是太粗糙了，本次更新的内容有：

美观的界面
退格的实现
添加了括号
根号的实现
正式的名称与版本号

import sys
from math import sqrt
from PyQt5.QtWidgets import QApplication,QWidget,QPushButton,QLineEdit,QLabelclass Window(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.let1 = QLineEdit(self)self.let1.move(0,0)self.let1.resize(1000,300)self.btn1 = QPushButton(self)self.btn1.setText('7')self.btn1.resize(250,250)self.btn1.move(0,550)self.btn1.clicked.connect(self.clickNum)self.btn2 = QPushButton(self)self.btn2.setText('8')self.btn2.resize(250,250)self.btn2.move(250,550)self.btn2.clicked.connect(self.clickNum)self.btn3 = QPushButton(self)self.btn3.setText('9')self.btn3.resize(250,250)self.btn3.move(500,550)self.btn3.clicked.connect(self.clickNum)self.btn4 = QPushButton(self)self.btn4.setText('4')self.btn4.resize(250,250)self.btn4.move(0,800)self.btn4.clicked.connect(self.clickNum)self.btn5 = QPushButton(self)self.btn5.setText('5')self.btn5.resize(250,250)self.btn5.move(250,800)self.btn5.clicked.connect(self.clickNum)self.btn6 = QPushButton(self)self.btn6.setText('6')self.btn6.resize(250,250)self.btn6.move(500,800)self.btn6.clicked.connect(self.clickNum)self.btn7 = QPushButton(self)self.btn7.setText('1')self.btn7.resize(250,250)self.btn7.move(0,1050)self.btn7.clicked.connect(self.clickNum)self.btn8 = QPushButton(self)self.btn8.setText('2')self.btn8.resize(250,250)self.btn8.move(250,1050)self.btn8.clicked.connect(self.clickNum)self.btn9 = QPushButton(self)self.btn9.setText('3')self.btn9.resize(250,250)self.btn9.move(500,1050)self.btn9.clicked.connect(self.clickNum)self.btn10 = QPushButton(self)self.btn10.setText('0')self.btn10.resize(250,250)self.btn10.move(250,1300)self.btn10.clicked.connect(self.clickNum)self.btn11 = QPushButton(self)self.btn11.setText('C')self.btn11.resize(250,250)self.btn11.move(0,300)self.btn11.clicked.connect(self.clickNum)self.btn12 = QPushButton(self)self.btn12.setText('.')self.btn12.resize(250,300)self.btn12.move(500,1550)self.btn12.clicked.connect(self.clickNum)self.btn13 = QPushButton(self)self.btn13.setText('+')self.btn13.resize(250,550)self.btn13.move(750,1300)self.btn13.clicked.connect(self.clickNum)self.btn14 = QPushButton(self)self.btn14.setText('-')self.btn14.resize(250,250)self.btn14.move(750,1050)self.btn14.clicked.connect(self.clickNum)self.btn15 = QPushButton(self)self.btn15.setText('*')self.btn15.resize(250,250)self.btn15.move(750,800)self.btn15.clicked.connect(self.clickNum)self.btn16 = QPushButton(self)self.btn16.setText('/')self.btn16.resize(250,250)self.btn16.move(750,550)self.btn16.clicked.connect(self.clickNum)self.btn17 = QPushButton(self)self.btn17.setText('=')self.btn17.resize(500,300)self.btn17.move(0,1550)self.btn17.clicked.connect(self.clickNum)self.btn18 = QPushButton(self)self.btn18.setText('(')self.btn18.resize(250,250)self.btn18.move(0,1300)self.btn18.clicked.connect(self.clickNum)self.btn19 = QPushButton(self)self.btn19.setText(')')self.btn19.resize(250,250)self.btn19.move(500,1300)self.btn19.clicked.connect(self.clickNum)self.btn20 = QPushButton(self)self.btn20.setText('←')self.btn20.resize(500,250)self.btn20.move(250,300)self.btn20.clicked.connect(self.backspace)self.btn21 = QPushButton(self)self.btn21.setText('sqrt(')self.btn21.resize(250,250)self.btn21.move(750,300)self.btn21.clicked.connect(self.clickNum)self.lbl1 = QLabel(self)self.lbl1.setText('蟒蛇计算器')self.lbl1.move(0,2000)self.lbl2 = QLabel(self)self.lbl2.setText('V2')self.lbl2.move(600,2000)self.let1.setStyleSheet('QLineEdit{font-size:100px;color:rgb(0,0,0)}')self.btn1.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn2.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn3.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn4.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn5.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn6.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn7.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn8.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn9.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn10.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn11.setStyleSheet('QPushButton{font-size:100px;color:rgb(255,127,0)}')self.btn12.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn13.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn14.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn15.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn16.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn17.setStyleSheet('QPushButton{font-size:100px;color:rgb(255,255,255);}\QPushButton{background-color:rgb(255,127,0)}\ QPushButton:hover{background-color:rgb(0,255,127)}')self.btn18.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn19.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn20.setStyleSheet('QPushButton{font-size:100px;color:rgb(0,0,0)}')self.btn21.setStyleSheet("QPushButton{font-size:80px;color:rgb(0,0,0)}")self.lbl1.setStyleSheet('QLabel{font-family:\'宋体\';font-size:120px;color:rgb(255,127,0)}')self.lbl2.setStyleSheet('QLabel{font-family:\'宋体\';font-size:150px;color:rgb(255,127,0)}')def clickNum(self):t = self.let1.text()new = self.sender().text()self.let1.setText(t+new)if new == 'C':self.let1.setText('')if new == '=':result = eval(str(t))self.let1.setText(str(result))def backspace(self):expression = self.let1.text()length = len(expression)expression = expression[0:length-1]self.let1.setText(expression)
if __name__ == '__main__':app = QApplication(sys.argv)root = Window()root.show()sys.exit(app.exec())

本人是用Pydroid3写的，所以界面可能有偏差，请自行调整！

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