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:
| sys | Access system-specific parameters and functions. | |
| __builtin__ | The module that provides the built-in namespace. | |
| __main__ | The environment where the top-level script is run. | |
| warnings | Issue warning messages and control their disposition. | |
| contextlib | Utilities for with-statement contexts. | |
| atexit | Register and execute cleanup functions. | |
| traceback | Print or retrieve a stack traceback. | |
| __future__ | Future statement definitions | |
| gc | Interface to the cycle-detecting garbage collector. | |
| inspect | Extract information and source code from live objects. | |
| site | A standard way to reference site-specific modules. | |
| user | A standard way to reference user-specific modules. | |
| fpectl | Provide control for floating point exception handling. |
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Python Library Reference |  |
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Release 2.5, documentation updated on 19th September, 2006.