super().__setattr__('training', True)

super().__setattr__('training', True)是Python中的一种特殊方法调用方式，用于在子类中调用父类的方法。在这个例子中，它调用了父类的__setattr__方法，并将'training'属性设置为True。

__setattr__是Python中的一个特殊方法，用于设置对象的属性。当我们使用赋值语句给对象的属性赋值时，实际上是调用了该对象的__setattr__方法。在这个例子中，通过调用super().__setattr__('training', True)，我们可以在子类中调用父类的__setattr__方法来设置属性。

需要注意的是，使用super().__setattr__('training', True)时，我们必须确保父类中存在名为__setattr__的方法，并且该方法接受两个参数：self和name。否则，会引发AttributeError异常。

相关问题

default_collate_func = dataloader.default_collate def default_collate_override(batch): dataloader._use_shared_memory = False return default_collate_func(batch) setattr(dataloader, 'default_collate', default_collate_override) for t in torch._storage_classes: if sys.version_info[0] == 2: if t in ForkingPickler.dispatch: del ForkingPickler.dispatch[t] else: if t in ForkingPickler._extra_reducers: del ForkingPickler._extra_reducers[t]这段代码的作用是什么

这段代码是用来设置在使用PyTorch的dataloader时改变默认的batch处理方式，以提高性能。具体来说，它使用了一个函数重载机制来替换原有的batch处理函数，并且禁用了共享内存的使用。同时，它还清除了一些与数据序列化相关的配置，以确保程序能够正确地运行。

super().__setattr__

`super().__setattr__()` is a built-in Python function that can be used to call the `__setattr__()` method of the parent class in a subclass. It is commonly used when you want to add some additional functionality to the `__setattr__()` method of the parent class without completely overriding it.

Here's an example:

class MyClass:
    def __setattr__(self, name, value):
        print(f"Setting {name} to {value}")
        super().__setattr__(name, value)

class MySubclass(MyClass):
    def __setattr__(self, name, value):
        print(f"Adding extra functionality for {name} = {value}")
        super().__setattr__(name, value.upper())

In this example, `MySubclass` is a subclass of `MyClass`. It overrides the `__setattr__()` method of its parent class to add some extra functionality. However, it still wants to call the `__setattr__()` method of the parent class to handle the actual setting of the attribute.

To do this, it uses `super().__setattr__(name, value.upper())` to call the `__setattr__()` method of the parent class and pass in the modified value. This allows it to add its own functionality while still preserving the functionality of the parent class.