main.py 文件源码

def calculate(self):
        ''' "="???????????????  '''
        try:
            self.display.text = str(eval(self.display.text)) # ???????  ??eval("5 + 10")??15???
            self.clear_bool = True

            print('????')
        except:
            # ?????????'=’??????????????
            print('error?????')


#class Calculator2(BoxLayout):
#    def __init__(self, **kwargs):
#        super(Calculator2, self).__init__(**kwargs)