用python实现带界面的计算器（Python经典编程案例）

骑猪看日落 2023-07-03 02:55 23阅读 0赞

用python实现带界面的计算器，代码如下：

""" 实现带界面的计算器（可做加减乘除操作） """
    
    from tkinter import *
    import tkinter.font
    from functools import partial
    
    
    def get_input(entry, argu):
        entry.insert(END, argu)
    
    
    def backspace(entry):
        input_len = len(entry.get())
        entry.delete(input_len - 1)
    
    
    def clear(entry):
        entry.delete(0, END)
    
    
    def calc(entry):
        input = entry.get()
        output = str(eval(input.strip()))
        clear(entry)
        entry.insert(END, output)
    
    
    def cal():
        root = Tk()
        root.title("Calc")
        root.resizable(0, 0)
    
        entry_font = tkinter.font.Font(size=12)
        entry = Entry(root, justify="right", font=entry_font)
        entry.grid(row=0, column=0, columnspan=4, sticky=N+W+S+E, padx=5,  pady=5)
    
        button_font = tkinter.font.Font(size=10, weight=tkinter.font.BOLD)
        button_bg = '#D5E0EE'
        button_active_bg = '#E5E35B'
    
        myButton = partial(Button, root, bg=button_bg, padx=10, pady=3, activebackground = button_active_bg)
    
        button7 = myButton(text='7', command=lambda: get_input(entry, '7'))
        button7.grid(row=1, column=0, pady=5)
    
        button8 = myButton(text='8', command=lambda: get_input(entry, '8'))
        button8.grid(row=1, column=1, pady=5)
    
        button9 = myButton(text='9', command=lambda: get_input(entry, '9'))
        button9.grid(row=1, column=2, pady=5)
    
        button10 = myButton(text='+', command=lambda: get_input(entry, '+'))
        button10.grid(row=1, column=3, pady=5)
    
        button4 = myButton(text='4', command=lambda: get_input(entry, '4'))
        button4.grid(row=2, column=0, pady=5)
    
        button5 = myButton(text='5', command=lambda: get_input(entry, '5'))
        button5.grid(row=2, column=1, pady=5)
    
        button6 = myButton(text='6', command=lambda: get_input(entry, '6'))
        button6.grid(row=2, column=2, pady=5)
    
        button11 = myButton(text='-', command=lambda: get_input(entry, '-'))
        button11.grid(row=2, column=3, pady=5)
    
        button1 = myButton(text='1', command=lambda: get_input(entry, '1'))
        button1.grid(row=3, column=0, pady=5)
    
        button2 = myButton(text='2', command=lambda: get_input(entry, '2'))
        button2.grid(row=3, column=1, pady=5)
    
        button3 = myButton(text='3', command=lambda: get_input(entry, '3'))
        button3.grid(row=3, column=2, pady=5)
    
        button12 = myButton(text='*', command=lambda: get_input(entry, '*'))
        button12.grid(row=3, column=3, pady=5)
    
        button0 = myButton(text='0', command=lambda: get_input(entry, '0'))
        button0.grid(row=4, column=0, columnspan=2, padx=3, pady=5, sticky=N+S+E+W)
    
        button13 = myButton(text='.', command=lambda: get_input(entry, '.'))
        button13.grid(row=4, column=2, pady=5)
    
        button14 = Button(root, text='/', bg=button_bg, padx=10, pady=3,
                          command=lambda: get_input(entry, '/'))
        button14.grid(row=4, column=3, pady=5)
    
        button15 = Button(root, text='<-', bg=button_bg, padx=10, pady=3,
                          command=lambda: backspace(entry), activebackground=button_active_bg)
        button15.grid(row=5, column=0, pady=5)
    
        button16 = Button(root, text='C', bg=button_bg, padx=10, pady=3,
                          command=lambda : clear(entry), activebackground=button_active_bg)
        button16.grid(row=5, column=1, pady=5)
    
        button17 = Button(root, text='=', bg=button_bg, padx=10, pady=3,
                          command=lambda: calc(entry), activebackground=button_active_bg)
        button17.grid(row=5, column=2, columnspan=2, padx=3, pady=5, sticky=N+S+E+W)
    
        root.mainloop()
    
    
    if __name__ == '__main__':
        cal()

执行结果如下图：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N1aV95b25naHVh_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N1aV95b25naHVh_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200131233211546.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N1aV95b25naHVh,size_16,color_FFFFFF,t_70