28. 파이썬 실행시간 서비스
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이 장에서 설명하는 모듈들은 파이썬 인터프리터와 그 환경과의 상호 작용
과 관련된 다양한 서비스를 제공합니다. 다음은 개요입니다:

* 28.1. "sys" --- System-specific parameters and functions

* 28.2. "sysconfig" --- Provide access to Python's configuration
  information

  * 28.2.1. Configuration variables

  * 28.2.2. Installation paths

  * 28.2.3. Other functions

* 28.3. "__builtin__" --- Built-in objects

* 28.4. "future_builtins" --- Python 3 builtins

* 28.5. "__main__" --- 최상위 스크립트 환경

* 28.6. "warnings" --- Warning control

  * 28.6.1. Warning Categories

  * 28.6.2. The Warnings Filter

    * 28.6.2.1. Default Warning Filters

  * 28.6.3. Temporarily Suppressing Warnings

  * 28.6.4. Testing Warnings

  * 28.6.5. Updating Code For New Versions of Python

  * 28.6.6. Available Functions

  * 28.6.7. Available Context Managers

* 28.7. "contextlib" --- Utilities for "with"-statement contexts

* 28.8. "abc" --- Abstract Base Classes

* 28.9. "atexit" --- Exit handlers

  * 28.9.1. "atexit" Example

* 28.10. "traceback" --- Print or retrieve a stack traceback

  * 28.10.1. Traceback Examples

* 28.11. "__future__" --- Future statement definitions

* 28.12. "gc" --- Garbage Collector interface

* 28.13. "inspect" --- Inspect live objects

  * 28.13.1. Types and members

  * 28.13.2. Retrieving source code

  * 28.13.3. Classes and functions

  * 28.13.4. The interpreter stack

* 28.14. "site" --- Site-specific configuration hook

* 28.15. "user" --- User-specific configuration hook

* 28.16. "fpectl" --- Floating point exception control

  * 28.16.1. Example

  * 28.16.2. Limitations and other considerations
