Python Tkinter简易计算器

今天闲暇时间用tkinter写了个简易计算器，可实现简单的加减乘除运算，用了Button和Entry2个控件，下面是代码，只是简单的用了偏函数partial，因为那么多button的大部分参数都是一样的，使用偏函数可以简化参数传递，避免同样的参数传递写N次。

# -*- coding: utf-8 -*-#author: Cullen#import the modulefrom Tkinter import *import tkFontimport osfrom functools import partialfrom PIL import Image, ImageTkdef 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 = tkFont.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 = tkFont.Font(size=10, weight=tkFont.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()

下面是运行结果：