• Python运行时服务

    Python运行时服务

    本章里描述的模块提供了和Python解释器及其环境交互相关的广泛服务。以下是综述：

    • sys —- 系统相关的参数和函数
    • sysconfig —- Provide access to Python's configuration information
      • 配置变量
      • 安装路径
      • 其他功能
      • Using sysconfig as a script
    • builtins —- 内建对象
    • main —- 顶层脚本环境
    • warnings —- Warning control
      • 警告类别
      • The Warnings Filter
        • Describing Warning Filters
        • 默认警告过滤器
        • Overriding the default filter
      • 暂时禁止警告
      • 测试警告
      • Updating Code For New Versions of Dependencies
      • Available Functions
      • Available Context Managers
    • dataclasses —- 数据类
      • 模块级装饰器、类和函数
      • 初始化后处理
      • 类变量
      • 仅初始化变量
      • 冻结的实例
      • 继承
      • 默认工厂函数
      • 可变的默认值
      • 异常
    • contextlib —- Utilities for with-statement contexts
      • 工具
      • 例子和配方
        • Supporting a variable number of context managers
        • Catching exceptions from enter methods
        • Cleaning up in an enter implementation
        • Replacing any use of try-finally and flag variables
        • Using a context manager as a function decorator
      • Single use, reusable and reentrant context managers
        • Reentrant context managers
        • Reusable context managers
    • abc —- 抽象基类
    • atexit —- 退出处理器
      • atexit 示例
    • traceback —- 打印或检索堆栈回溯
      • TracebackException Objects
      • StackSummary Objects
      • FrameSummary Objects
      • Traceback Examples
    • future —- Future 语句定义
    • gc —- 垃圾回收器接口
    • inspect —- 检查对象
      • 类型和成员
      • Retrieving source code
      • Introspecting callables with the Signature object
      • 类与函数
      • The interpreter stack
      • Fetching attributes statically
      • Current State of Generators and Coroutines
      • Code Objects Bit Flags
      • Command Line Interface
    • site —- Site-specific configuration hook
      • Readline configuration
      • 模块内容