python描述器(Descriptor) - 知乎 - 知乎专栏
网页object.__get__(self, instance, owner) 调用时得到类的属性（类属性访问控制）或者类的实例的属性(实例属性访问控制)，owner是属性所在类，instance是属性所在类的实例或None(如果通过类进行访问的话)。该方法要么返回属性值，要么抛出AttributeError异常。
Python 理解__get__和__set__以及Python描述符|极客教程
网页self是描述符实例自身，instance是访问属性的类实例，owner是属性的所有者类。 在上面的示例中，self是Descriptor实例，instance是MyClass实例，owner是MyClass类本身。 set 方法用于设置类属性的值。 当我们通过实例对属性进行赋值时，如果属性具有 set 方法，则会调用该方法来设置属性的值。 以下是一个示例： class Descriptor: def __set__(self, instance, value): print("Setting the attribute") . instance._value = value. class MyClass: . …
What is the purpose of instance and owner in Python descriptors ...
网页2019年3月8日 · instance - this refers to the object of the class owner where you defined the descriptor object. The purpose of passing the instance to the __get__ method of the descriptor is to make sure we know and identify from which object of the owner class you are accessing the descriptor instance.
describe-instances — AWS CLI 1.34.24 Command Reference
网页Describes the specified instances or all instances. If you specify instance IDs, the output includes information for only the specified instances. If you specify filters, the output includes information for only those instances that meet the filter criteria.
DescribeInstances - Amazon Elastic Compute Cloud
网页Describes the specified instances or all instances. If you specify instance IDs, the output includes information for only the specified instances. If you specify filters, the output includes information for only those instances that meet the filter criteria.
Identify the user that launched an Amazon EC2 instance in an …
网页Follow these steps: Open the Amazon EC2 console, and then choose Instances from the navigation pane. Select the instance, and note the Instance ID from the Details tab. To view CloudTrail events and identify the user information associated with the instance launch, follow these steps:
Python 理解__get__和__set__以及Python描述符|极客笔记
网页get方法在属性被访问时被调用，它接受三个参数：self、instance和owner。在定义描述符时，我们将get方法作为属性的访问方法，通过它来获取属性的值。下面是一个示例：
How to find the username of the instance launched in amazon-ec2?
网页2013年12月26日 · Get the default user name for the AMI that you used to launch your instance: For Amazon Linux 2 or the Amazon Linux AMI, the user name is ec2-user. For a CentOS AMI, the user name is centos or ec2-user.
How to start with db2 after installation - Stack Overflow
网页2011年6月8日 · The user you should be logged in as to start working with DB2 is the instance owner (this is a different user than the DAS owner). If you're not sure which user owns the DB2 instance, or if an instance exists yet, use the db2ilist command to show a list of all instances installed on the local server. As the db2 instance owner you can run ...
describe-instances — AWS CLI 2.9.19 Command Reference
网页2019年2月9日 · Describes the specified instances or all instances. If you specify instance IDs, the output includes information for only the specified instances. If you specify filters, the output includes information for only those instances that meet the filter criteria.
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