本文实例讲述了Python开发的实用计算器。分享给大家供大家参考，具体如下：

实现功能：图形界面PyQt，输入框，+，—，*，/ ；乘方 ，开方 ，取余，清零。

1. Python代码：

#!/usr/bin/env python# -*- coding: utf-8 -*-'''Author : Mr.LiuYCCreated on 2014-09-30E-Mail : liuyanchen0725@gmail.comIntroduction: 简易计算器 实现图形界面PyQt，输入框，+，—，*，/ ；乘方 ，开方 ，取余，清零。'''from PyQt4 import QtGui,QtCoreimport sys , math , stringclass Example(QtGui.QWidget): def __init__(self,parent=None): QtGui.QWidget.__init__(self,parent=parent) self.initUI() self.last = [] def initUI(self): list = ['%','**','sqrt','C',7,8,9,'+',4,5,6,'-',1,2,3,'*',0,'.','=','/'] length = len(list) for i in xrange(length): self.button = QtGui.QPushButton(str(list[i]),self) self.button.clicked.connect(self.onButtonClick) x = i % 4 y = i / 4 self.button.move(x * 40 + 10,y * 40 + 90) self.button.resize(30,30) self.lineEdit = QtGui.QLineEdit('',self) self.lineEdit.move(10,10) self.lineEdit.resize(150,70) self.setGeometry(200, 200, 170, 300) self.setWindowTitle('Quit buttom') self.show() def onButtonClick(self): t = self.lineEdit.text() new = self.sender().text() self.last.append(new) print self.last self.lineEdit.setText(t+new) if new == '=': result = eval(str(t)) self.lineEdit.setText(str(result)) if new == 'C': self.lineEdit.setText('') if new == 'sqrt': self.lineEdit.setText('') result = math.sqrt(string.atof(t)) self.lineEdit.setText(str(result))if __name__ == '__main__': app = QtGui.QApplication(sys.argv) e = Example() sys.exit(app.exec_())

2. calculator.py

#!/usr/bin/env python# -*- coding: utf-8 -*-'''Author : Mr.LiuYCCreated on 2014-09-30E-Mail : liuyanchen0725@gmail.comIntroduction: 简易计算器 实现图形界面PyQt，输入框，+，—，*，/ ；乘方 ，开方 ，取余，清零。'''from PyQt4 import QtGui,QtCoreimport sys , math , stringclass Example(QtGui.QWidget): def __init__(self,parent=None): QtGui.QWidget.__init__(self,parent=parent) self.initUI() self.last = [] def initUI(self): list = ['%','**','sqrt','C',7,8,9,'+',4,5,6,'-',1,2,3,'*',0,'.','=','/'] length = len(list) for i in xrange(length): self.button = QtGui.QPushButton(str(list[i]),self) self.button.clicked.connect(self.onButtonClick) x = i % 4 y = i / 4 self.button.move(x * 40 + 10,y * 40 + 90) self.button.resize(30,30) self.lineEdit = QtGui.QLineEdit('',self) self.lineEdit.move(10,10) self.lineEdit.resize(150,70) self.setGeometry(200, 200, 170, 300) self.setWindowTitle('Quit buttom') self.show() def onButtonClick(self): t = self.lineEdit.text() new = self.sender().text() self.last.append(new) print self.last self.lineEdit.setText(t+new) if new == '=': result = eval(str(t)) self.lineEdit.setText(str(result)) if new == 'C': self.lineEdit.setText('') if new == 'sqrt': self.lineEdit.setText('') result = math.sqrt(string.atof(t)) self.lineEdit.setText(str(result))if __name__ == '__main__': app = QtGui.QApplication(sys.argv) e = Example() sys.exit(app.exec_())

3. 运行效果图如下：

PS：这里再为大家推荐几款计算工具供大家进一步参考借鉴：

在线一元函数（方程）求解计算工具：
http://tools.jb51.net/jisuanqi/equ_jisuanqi

科学计算器在线使用_高级计算器在线计算：
http://tools.jb51.net/jisuanqi/jsqkexue

在线计算器_标准计算器：
http://tools.jb51.net/jisuanqi/jsq

更多关于Python相关内容感兴趣的读者可查看本站专题：《Python数据结构与算法教程》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python入门与进阶经典教程》及《Python文件与目录操作技巧汇总》

希望本文所述对大家Python程序设计有所帮助。