Python-socket Network Programming

1. The special member method of the class 1.1__doc__ represents the description information of the class

1.2__module__ and __class__

__MODULE__ represents the object of the current operation in that module

__CLASS__ represents the class to which the current operation's object belongs

The 1.3__init__ constructor, when the object is created by the class, automatically triggers the 1.4__del__ destructor, which is automatically triggered when the function execution is complete. Automatic triggering when manually triggering 1.5__call__ object brackets in normal situations

Note: The execution of the construction method is triggered by the creation object, that is: Object = class name; for the execution of the __call__ method

Is triggered by an object followed by parentheses: Object () or Class () ()

1.6__dict__ viewing the member properties of a class or object

1.7__str__ if the __str__ method is defined in a class, the output object automatically triggers its return value

1.8__getitem__,__setitem__,__delitem__

Used for index operations, such as dictionaries, which are obtained, set, deleted, respectively

2. Create Class two ways

#type第一个参数：类名

#type第二个参数：当前类的基类

#type第三个参数：类的成员

The class's build call order is __new__---__call__--and __init__

3. Reflection

There are four ways to do this by using a string or by modifying the program's Running state:

Hasattr to determine whether a property exists

GetAttr Getting properties

SetAttr Setting properties

Delattr Deleting properties

Importing modules as strings

Import__import__('import_lib.metaclass'#  This is the interpreter's own internal use of the #importlib.import_module (' Import_lib.metaclass ') #与上面这句效果一样, the official proposal with this

4. Exception Handling

5. Network programming

Python-socket Network Programming