運(yùn)行效果：

完整代碼

from tkinter import *def click(num): global op op=op+str(num) iptext.set(op)def evaluate(): global op output=str(eval(op)) iptext.set(output)def clearDisplay(): global op op='' iptext.set(op)calc=Tk()calc.title('TechVidvan Calculator')op=''iptext=StringVar()iparea=Entry(calc,font=(’large,_font’,15,’bold’),bd=10,justify='right',insertwidth=4,textvariable=iptext).grid(columnspan=10)bt7=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(7),bg='lavender',text='7',bd=5,padx=15,pady=10).grid(row=1,column=0)bt8=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(8),bg='lavender',text='8',bd=5,padx=15,pady=10).grid(row=1,column=1)bt9=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(9),bg='lavender',text='9',bd=5,padx=15,pady=10).grid(row=1,column=2)add=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(’+’),bg='lavender',text='+',bd=5,padx=15,pady=10).grid(row=1,column=3)bt4=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(4),bg='lavender',text='4',bd=5,padx=15,pady=10).grid(row=2,column=0)bt5=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(5),bg='lavender',text='5',bd=5,padx=15,pady=10).grid(row=2,column=1)bt6=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(6),bg='lavender',text='6',bd=5,padx=15,pady=10).grid(row=2,column=2)sub=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(’-’),bg='lavender',text='-',bd=5,padx=15,pady=10).grid(row=2,column=3)bt1=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(1),bg='lavender',text='1',bd=5,padx=15,pady=10).grid(row=3,column=0)bt2=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(2),bg='lavender',text='2',bd=5,padx=15,pady=10).grid(row=3,column=1)bt3=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(3),bg='lavender',text='3',bd=5,padx=15,pady=10).grid(row=3,column=2)mul=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(’*’),bg='lavender',text='*',bd=5,padx=15,pady=10).grid(row=3,column=3)bt0=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(0),bg='lavender',text='0',bd=5,padx=15,pady=10).grid(row=4,column=0)btC=Button(calc,font=(’arial’,15,’bold’),command=clearDisplay,bg='lavender',text='C',bd=5,padx=15,pady=10).grid(row=4,column=1)eql=Button(calc,font=(’arial’,15,’bold’),command=evaluate,bg='lavender',text='=',bd=5,padx=15,pady=10).grid(row=4,column=2)div=Button(calc,font=(’arial’,15,’bold’),command=lambda:click(’/’),bg='lavender',text='/',bd=5,padx=15,pady=10).grid(row=4,column=3)calc.mainloop()

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