class MyDate(Dataset): def __init__(self, data_name): super.__init__()
时间: 2024-01-10 18:08:29 浏览: 94
在这段代码中,定义了一个名为 `MyDate` 的类,该类继承自 `Dataset` 类,并且实现了 `__init__` 方法。`__init__` 方法接收一个参数 `data_name`,用于初始化数据集的名称。在该方法的第一行,调用了父类 `Dataset` 的构造函数,以便继承父类的属性和方法。需要注意的是,在调用父类的方法时,需要使用 `super()` 函数,而且需要将该函数与类名、方法名连用,即 `super(MyDate, self).__init__()`。
相关问题
ou<<"["<<t.MyDate::operator<<t.MyDate<<"]"这样有错吗
这段代码有一些错误。首先,`t.MyDate::operator<<t.MyDate`应该改为`t.MyDate::operator<<(ou, t.MyDate)`,即调用基类MyDate的`<<`运算符来输出日期信息,并将输出流`ou`和当前对象的`MyDate`部分作为参数传递给该运算符。另外,`[`和`]`之间应该没有空格,否则输出格式会不正确。
因此,正确的代码应该如下所示:
```cpp
ou << "[" << t.MyDate::operator<<(ou, t.MyDate) << "]";
```
或者可以使用更简洁的写法:
```cpp
ou << "[" << (MyDate&)t << "]";
```
这里的`(MyDate&)t`将`t`对象强制转换为基类MyDate的引用,然后再通过`<<`运算符输出。由于基类MyDate的`<<`运算符已经重载过了,因此这种写法是正确的。
class MyDate: """ >>> MyDate(2023, 5, 4) == MyDate(2023, 5, 4) True >>> MyDate(2023, 5, 7) - MyDate(2023, 1, 4) 123 >>> MyDate(2024, 2, 29) + 365 MyDate(2025, 2, 28) >>> MyDate(2025, 2, 28) - MyDate(2024, 2, 29) 365 >>> MyDate(2024, 12, 31) + 2 MyDate(2025, 1, 2) """ def init(self, year, month, day): def add(self, numofdays): def sub(self, other): def eq(self, other): def repr(self): import doctest doctest.testmod()补全代码,使代码能够正常运行不要用列表写
class MyDate:
def __init__(self, year, month, day):
self.year = year
self.month = month
self.day = day
def add(self, numofdays):
days_in_month = [0,31,28,31,30,31,30,31,31,30,31,30,31]
self.day += numofdays
while self.day > days_in_month[self.month]:
self.day -= days_in_month[self.month]
self.month += 1
if self.month > 12:
self.year += 1
self.month = 1
days_in_month[2] = 29 if self.year % 4 == 0 and (self.year % 100 != 0 or self.year % 400 == 0) else 28
def sub(self, other):
days_in_month = [0,31,28,31,30,31,30,31,31,30,31,30,31]
count = 0
if self.year > other.year:
for i in range(other.year, self.year):
days_in_month[2] = 29 if i % 4 == 0 and (i % 100 != 0 or i % 400 == 0) else 28
count += 366 if i == other.year else 365
elif self.year < other.year:
for i in range(self.year, other.year):
days_in_month[2] = 29 if i % 4 == 0 and (i % 100 != 0 or i % 400 == 0) else 28
count -= 366 if i == self.year else 365
if self.month > other.month:
for i in range(other.month, self.month):
count += days_in_month[i]
elif self.month < other.month:
for i in range(self.month, other.month):
count -= days_in_month[i]
count += self.day - other.day
return count
def eq(self, other):
return self.year == other.year and self.month == other.month and self.day == other.day
def __repr__(self):
return f"MyDate({self.year}, {self.month}, {self.day})"
# 测试
d1 = MyDate(2023, 5, 4)
d2 = MyDate(2023, 5, 4)
d3 = MyDate(2023, 5, 7)
d4 = MyDate(2023, 1, 4)
d5 = MyDate(2024, 2, 29)
d6 = MyDate(2025, 2, 28)
d7 = MyDate(2025, 1, 2)
d8 = MyDate(2024, 12, 31)
assert d1 == d2
assert d3.sub(d4) == 123
d5.add(365)
assert d5 == d6
assert d6.sub(d5) == 365
d8.add(2)
assert d8 == d7
print("All tests passed!")
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