我是初学者，碰到了一个关于装饰器的问题，代码如下。希望大大告知哪句话该怎么改

Question

#coding:utf-8
#创建类，能够通过“年-月-日”字符串创建实例，并检验年、月、日是否合法。
class Date(object):
    def __init__(self, year=0, month=0, day=0):
        self.year = year
        self.month = month
        self.day = day
        
    @classmethod
    def from_string(cls, date_as_string):
        year, month, day = map(int, date_as_string.split('-'))
        date1 = cls(year, month, day)
        return date1

    @staticmethod()
    def is_date_valid(date_as_string):
        year, month, day = map(int, date_as_string.split('-'))
        return day <= 31 and month <=12 and year <=2038

d = Date.from_string('2019-11-11')
is_date = Date.is_date_valid('2019-11-11')
print(is_date)

然后报错结果如下：
Traceback (most recent call last):
File "", line 3, in
File "", line 15, in Date
TypeError: staticmethod expected 1 argument, got 0

Answer 1

后面没有括号
@staticmethod()改为 @staticmethod
有帮助望采纳~