Posted in Python onMay 10, 2017
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.LiuYC Created on 2014-09-30 E-Mail : liuyanchen0725@gmail.com Introduction: 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,QtCore import sys , math , string class 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.LiuYC Created on 2014-09-30 E-Mail : liuyanchen0725@gmail.com Introduction: 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,QtCore import sys , math , string class 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.3water.com/jisuanqi/equ_jisuanqi
科学计算器在线使用_高级计算器在线计算:
http://tools.3water.com/jisuanqi/jsqkexue
在线计算器_标准计算器:
http://tools.3water.com/jisuanqi/jsq
希望本文所述对大家Python程序设计有所帮助。
Python开发的实用计算器完整实例
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lyc0725声明:登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述。
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