python's staticmethod

staticmethod function-static method is defined as a class method, the correct way is to use @staticmethod装饰器，这样在实例对象调用的时候，不会把实例对象本身传入静态方法的第一个参数了

Similar to the following, do not use the case of the example itself:

@staticmethod
def getStr(result):
    if type(result) == tuple:
        if type(result[0]) == tuple:
            return result[0][0]
        else:
            return result[0]