Python gui

内容

用Python实现简易计算机

代码

    from tkinter import * 
    def calculate():
        result=eval(equ.get())
        equ.set(equ.get()+'=\n'+str(result))
    def show(buttonString):
        content=equ.get()
        if content=='0':
            content=""
        equ.set(content+buttonString)
    root = Tk()
    root.title('计算器')
    equ = StringVar()
    equ.set('0')
    label = Label(root, width=25, height=2, relief=RAISED, anchor=SE,
                  textvariable=equ)
    label.grid(row=0, column=0, columnspan=4, padx=5, pady=5)
    clearButton=Button(root, text='C', fg='blue', width=5, command=lambda:equ.set('0'))
    clearButton.grid(row=1, column=0)
    Button(root, text='DEL', width=5, command=lambda:equ.set(str(equ.get()[:-1]))).grid(row=1,column=1)
    Button(root, text="%", width=5,command=lambda:show('%')).grid(row=1, column=2)
    Button(root, text="/", width=5,command=lambda:show('/')).grid(row=1, column=3)
    Button(root, text="7", width=5,command=lambda:show('7')).grid(row=2, column=0)
    Button(root, text="8", width=5,command=lambda:show('8')).grid(row=2, column=1)
    Button(root, text="9", width=5,command=lambda:show('9')).grid(row=2, column=2)
    Button(root, text="*", width=5,command=lambda:show('*')).grid(row=2, column=3)
    Button(root, text="4", width=5,command=lambda:show('4')).grid(row=3, column=0)
    Button(root, text="5", width=5,command=lambda:show('5')).grid(row=3, column=1)
    Button(root, text="6", width=5,command=lambda:show('6')).grid(row=3, column=2)
    Button(root, text="-", width=5,command=lambda:show('-')).grid(row=3, column=3)
    Button(root, text="1", width=5,command=lambda:show('1')).grid(row=4, column=0)
    Button(root, text="2", width=5,command=lambda:show('2')).grid(row=4, column=1)
    Button(root, text="3", width=5,command=lambda:show('3')).grid(row=4, column=2)
    Button(root, text="+", width=5,command=lambda:show('+')).grid(row=4, column=3)
    Button(root, text="0", width=5,command=lambda:show('0')).grid(row=5, column=0,columnspan=2)
    Button(root, text=".", width=5,command=lambda:show('.')).grid(row=5, column=2)
    Button(root, text="=", width=5,command=lambda:calculate()).grid(row=5, column=3)
    root.mainloop()