python 简易计算器，python计算器,#-*- coding:

python 简易计算器，python计算器,#-*- coding:

#-*- coding:UTF-8-*-#Simple Cal#######################from Tkinter import *def frame(root, side):    w = Frame(root)    w.pack(side=side, expand=YES, fill=BOTH)    return w#end of defdef button(root, side, text, command=None):    w = Button(root, text=text, command=command)    w.pack(side=side, expand=YES, fill=BOTH)    return w#end of defclass Calculator(Frame):    def __init__(self):        Frame.__init__(self)        #self.oprion_add('*Font', 'Verdana 12 bold')        self.option_add('*Font', 'Verdana 12 bold')        self.pack(expand=YES, fill=BOTH)        self.master.title('Simple Cal')        self.master.iconname('calc1')        display = StringVar()        Entry(self, relief=SUNKEN, textvariable=display).pack(side=TOP, expand=YES, fill=BOTH)        for key in ('123', '456', '789', '+0.'):            keyF = frame(self, TOP)            for char in key:                button(keyF, LEFT, char, lambda w=display, c=char: w.set(w.get() + c))        #end of for        opsF = frame(self, TOP)        for char in '-*/=':            if char == '=':                btn = button(opsF, LEFT, char)                btn.bind('<ButtonRelease-1>', lambda e, s=self, w=display: s.calc(w), '+')            else:                btn = button(opsF, LEFT, char, lambda w=display, s='%s '%char: w.set(w.get() + s))            #end of if        #end of for         clearF = frame(self, BOTTOM)        button(clearF, LEFT, 'Clr', lambda w=display: w.set(''))    #end of def    def calc(self, display):        try:            display.set(eval(display.get()))        except:            display.set('ERROR')        #end of try and except    #end of def#end of classif __name__ == '__main__':    Calculator().mainloop()#该片段来自于http://byrx.net