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理解Descriptor in Python
阅读量:357 次
发布时间:2019-03-04

本文共 897 字,大约阅读时间需要 2 分钟。

  • Abstract

    Python descriptors were introduced in Python 2.2, along with new style classes

    Defines descriptors, summarizes the protocol, and shows how descriptors ara called. Examines a custom descripto and several built-in Python descriptors including

    functions,

    properties,

    static methods,

    class methods.

    Shows how each works by giving a pure Python equivalent and a sample application.

    Learning about descriptors not only provides access to a larger toolset, it creates a deeper understanding of how Python works and appreciation for the elegance of its design.

  • Definition and Introduction

    In general, a descriptor is an object attribute with “binding behavior”, one whose attribute access has been overridden by methods in the descriptor protocol.

    Those methods are __get__(), __set__(),and __delete__().

    If any of those methods are defined for an object, it is said to be a descriptor.

  • Reference

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