今天小编给大家分享一下怎么用python制作简单计算器功能的相关知识点,内容详细,逻辑清晰,相信大部分人都还太了解这方面的知识,所以分享这篇文章给大家参考一下,希望大家阅读完这篇文章后有所收获,下面我们一起来了解一下吧。
效果如图:
主要思路:
用列表保存按下的键,按下等于,转换为字符串,利用内置函数eval计算字符串的值。
代码:
from tkinter import * W = 280 #窗口宽度 H = 460 #窗口高度 process_H = 110 #显示运算过程的标签高度 result_H = 50 #显示运算结果的标签高度 msFont = '微软雅黑' #字体 fontSize = 20 #字体大小 btnBoderWidth = 0.5 #边框宽度 btnColor = '#4F4F4F' #按钮颜色 btnWidth = 70 #按钮宽度 btnHeight = 60 #按钮高度 mainWindows = Tk() mainWindows.title('计算器') mainWindows.minsize(W,H) str_process = StringVar() str_process.set("") str_result = StringVar() str_result.set("0") process = Label(mainWindows,font=(msFont,fontSize),bg='orange',anchor='se',wraplength='280',textvariable=str_process) process.place(width=W,height=process_H) #显示运算过程的标签 result = Label(mainWindows,font=(msFont,fontSize+10),bg='orange',anchor='se',textvariable=str_result) result.place(y=process_H,width=W,height=result_H) #显示运算结果的标签 button_AC = Button(mainWindows,font=(msFont,fontSize),text='AC',fg='orange',bd=btnBoderWidth,command=lambda :clickAC()) button_AC.place(x=0,y=process_H+result_H,width=btnWidth,height=btnHeight) button_back = Button(mainWindows,font=(msFont,fontSize),text='←',fg=btnColor,bd=btnBoderWidth,command=lambda :clickBack()) button_back.place(x=btnWidth,y=process_H+result_H,width=btnWidth,height=btnHeight) button_div = Button(mainWindows,font=(msFont,fontSize),text='÷',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper('/')) button_div.place(x=btnWidth*2,y=process_H+result_H,width=btnWidth,height=btnHeight) button_mul = Button(mainWindows,font=(msFont,fontSize),text='×',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper('*')) button_mul.place(x=btnWidth*3,y=process_H+result_H,width=btnWidth,height=btnHeight) button_7 = Button(mainWindows,font=(msFont,fontSize),text='7',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('7')) button_7.place(x=0,y=process_H+result_H+btnHeight,width=btnWidth,height=btnHeight) button_8 = Button(mainWindows,font=(msFont,fontSize),text='8',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('8')) button_8.place(x=btnWidth,y=process_H+result_H+btnHeight,width=btnWidth,height=btnHeight) button_9 = Button(mainWindows,font=(msFont,fontSize),text='9',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('9')) button_9.place(x=btnWidth*2,y=process_H+result_H+btnHeight,width=btnWidth,height=btnHeight) button_minus = Button(mainWindows,font=(msFont,fontSize),text='-',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper('-')) button_minus.place(x=btnWidth*3,y=process_H+result_H+btnHeight,width=btnWidth,height=btnHeight) button_4 = Button(mainWindows,font=(msFont,fontSize),text='4',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('4')) button_4.place(x=0,y=process_H+result_H+btnHeight*2,width=btnWidth,height=btnHeight) button_5 = Button(mainWindows,font=(msFont,fontSize),text='5',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('5')) button_5.place(x=btnWidth,y=process_H+result_H+btnHeight*2,width=btnWidth,height=btnHeight) button_6 = Button(mainWindows,font=(msFont,fontSize),text='6',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('6')) button_6.place(x=btnWidth*2,y=process_H+result_H+btnHeight*2,width=btnWidth,height=btnHeight) button_add = Button(mainWindows,font=(msFont,fontSize),text='+',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper('+')) button_add.place(x=btnWidth*3,y=process_H+result_H+btnHeight*2,width=btnWidth,height=btnHeight) button_1 = Button(mainWindows,font=(msFont,fontSize),text='1',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('1')) button_1.place(x=0,y=process_H+result_H+btnHeight*3,width=btnWidth,height=btnHeight) button_2 = Button(mainWindows,font=(msFont,fontSize),text='2',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('2')) button_2.place(x=btnWidth,y=process_H+result_H+btnHeight*3,width=btnWidth,height=btnHeight) button_3 = Button(mainWindows,font=(msFont,fontSize),text='3',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('3')) button_3.place(x=btnWidth*2,y=process_H+result_H+btnHeight*3,width=btnWidth,height=btnHeight) button_equal = Button(mainWindows,font=(msFont,fontSize),text='=',bg='orange',fg=btnColor,bd=btnBoderWidth,command=lambda :clickEqual()) button_equal.place(x=btnWidth*3,y=process_H+result_H+btnHeight*3,width=btnWidth,height=btnHeight*2) button_percent = Button(mainWindows,font=(msFont,fontSize),text='%',fg=btnColor,bd=btnBoderWidth,command=lambda :clickOper("%")) button_percent.place(x=0,y=process_H+result_H+btnHeight*4,width=btnWidth,height=btnHeight) button_0 = Button(mainWindows,font=(msFont,fontSize),text='0',fg=btnColor,bd=btnBoderWidth,command=lambda :clickNum('0')) button_0.place(x=btnWidth,y=process_H+result_H+btnHeight*4,width=btnWidth,height=btnHeight) button_point = Button(mainWindows,font=(msFont,fontSize),text='.',fg=btnColor,bd=btnBoderWidth,command=lambda :clickPoint()) button_point.place(x=btnWidth*2,y=process_H+result_H+btnHeight*4,width=btnWidth,height=btnHeight) process_list = [] s_result = "" isNum = [False] #上一位按下的是否是数字 point = [True] #小数点使用情况 def clickNum(num): #按下数字 isNum.append(True) point.append(point[-1]) #按下数字,小数点的标志不变 process_list.append(num) s_process = "".join(process_list) str_process.set(s_process) def clickOper(sign):#按下运算符 global isNum,point if isNum[-1]: process_list.append(sign) isNum.append(False) point.append(True) #按下运算符,小数点标志为可以按下小数点 else: process_list.pop() process_list.append(sign) s_process = "".join(process_list) str_process.set(s_process) def clickEqual():#按下等于 global s_result s_process = "".join(process_list) s_result = eval(s_process) s_result = str(s_result)[0:11] #结果只显示11位 str_process.set(s_process) str_result.set(s_result) def clickAC():#按下清除 global s_result,isNum,point s_result = "0" isNum = [False] #状态回到初始时候 point = [True] process_list.clear() str_result.set(s_result) str_process.set("") def clickBack(): #按下退格键 global point, isNum if len(process_list) > 0: isNum.pop(-1) #删除最后一位的状态 point.pop(-1) process_list.pop() s_process = "".join(process_list) str_process.set(s_process) def clickPoint():#按下小数点 global point,isNum if isNum[-1] and point[-1]: process_list.append(".") s_process = "".join(process_list) str_process.set(s_process) isNum.append(False) point.append(False) mainWindows.mainloop()
以上就是“怎么用python制作简单计算器功能”这篇文章的所有内容,感谢各位的阅读!相信大家阅读完这篇文章都有很大的收获,小编每天都会为大家更新不同的知识,如果还想学习更多的知识,请关注亿速云行业资讯频道。
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。