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Reference

ActivePython 2.4

Python Documentation

Library Reference

3. Python Runtime Services

3.1 sys -- System-specific parameters and functions

3.2 gc -- Garbage Collector interface

3.3 weakref -- Weak references

3.4 fpectl -- Floating point exception control

3.5 atexit -- Exit handlers

3.6 types -- Names for built-in types

3.7 UserDict -- Class wrapper for dictionary objects

3.8 UserList -- Class wrapper for list objects

3.9 UserString -- Class wrapper for string objects

3.10 operator -- Standard operators as functions.

3.11 inspect -- Inspect live objects

3.12 traceback -- Print or retrieve a stack traceback

3.13 linecache -- Random access to text lines

3.14 pickle -- Python object serialization

3.15 cPickle -- A faster pickle

3.16 copy reg -- Register pickle support functions

3.17 shelve -- Python object persistence

3.18 copy -- Shallow and deep copy operations

3.19 marshal -- Internal Python object serialization

3.20 warnings -- Warning control

3.21 imp -- Access the import internals

3.22 zipimport -- Import modules from Zip archives

3.23 pkgutil -- Package extension utility

3.24 modulefinder -- Find modules used by a script

3.25 code -- Interpreter base classes

3.26 codeop -- Compile Python code

3.27 pprint -- Data pretty printer

3.28 repr -- Alternate repr() implementation

3.29 new -- Creation of runtime internal objects

3.30 site -- Site-specific configuration hook

3.31 user -- User-specific configuration hook

3.32 builtin -- Built-in objects

3.33 main -- Top-level script environment

3.34 future -- Future statement definitions

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3.33 `main` -- Top-level script environment

This module represents the (otherwise anonymous) scope in which the interpreter's main program executes -- commands read either from standard input, from a script file, or from an interactive prompt. It is this environment in which the idiomatic ``conditional script'' stanza causes a script to run:

if __name__ == "__main__":
    main()

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3.33 __main__ -- Top-level script environment

3.33 `main` -- Top-level script environment