26. Python Runtime Services

The modules described in this chapter provide a wide range of services related to the Python interpreter and its interaction with its environment. Here’s an overview:

• 26.1. sys — System-specific parameters and functions
• 26.2. __builtin__ — Built-in objects
• 26.3. __main__ — Top-level script environment
• 26.4. warnings — Warning control
  • 26.4.1. Warning Categories
  • 26.4.2. The Warnings Filter
  • 26.4.3. Temporarily Suppressing Warnings
  • 26.4.4. Testing Warnings
  • 26.4.5. Available Functions
  • 26.4.6. Available Context Managers
• 26.5. contextlib — Utilities for with-statement contexts.
• 26.6. atexit — Exit handlers
  • 26.6.1. atexit Example
• 26.7. traceback — Print or retrieve a stack traceback
  • 26.7.1. Traceback Examples
• 26.8. __future__ — Future statement definitions
• 26.9. gc — Garbage Collector interface
• 26.10. inspect — Inspect live objects
  • 26.10.1. Types and members
  • 26.10.2. Retrieving source code
  • 26.10.3. Classes and functions
  • 26.10.4. The interpreter stack
• 26.11. site — Site-specific configuration hook
• 26.12. user — User-specific configuration hook