How to realize introspection in Python
Today, I would like to talk to you about how to achieve introspection in Python. Many people may not know much about it. In order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article.
Q: what are the ways for Python to achieve introspection?
A: introspection is an act of self-examination. In computer programming, introspection refers to the ability to examine something to determine what it is, what it knows, and what it can do. Introspection provides programmers with great flexibility and control.
To put it more simply and bluntly: introspection is that a program written in an object-oriented language can know the type of object at run time. One sentence can be summarized as follows: the runtime can know the type of object.
There are many ways to realize introspection in Python, and the commonly used ones are
Type () to determine the type of object
Dir (), which gets all the properties and methods of the object with parameters; without parameters, returns a list of variables, methods, and defined types in the current scope
Help (), used to view a detailed description of the purpose of a function or module
Isinstance () to determine whether the object is of a known type
Issubclass () to determine whether one class is a subclass of another class
Hasattr () to determine whether the object contains the corresponding attribute
Getattr (), get object properties
Setattr (), setting object properties
Id (): used to get the memory address of the object
Callable (): determines whether the object can be called.
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