Professional IronPython

hotshot: Gives you a high-performance logging profiler. See 
http://docs.python.org/
library/hotshot.html
for details.
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json: Implements the JavaScript Object Notation (JSON) encoder and decoder used as a light-
weight data exchange format. See 
http://docs.python.org/library/json.html
for details.
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msilib: Reads and writes Microsoft Installer (MSI) files. The Microsoft Installer Library 
(MSILib) is an essential library for Windows systems where you need to work with .MSI 
files often. See 
http://docs.python.org/library/msilib.html
for details.
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multiprocessing: Helps you create multi-processing applications. This is an exciting new 
addition for Python 2.6. See 
http://docs.python.org/library/multiprocessing.html
for details.
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sqlite3: Provides access to the SQLite database library. See 
http://docs.python.org/
library/sqlite3.html
for details. You can learn more about the SQLite database at 
http://www.sqlite.org/
.
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test: Contains a complete test package for the Python Standard Library. If you make any 
changes to the Standard Library to meet your specific needs, you want to perform regression 
testing to ensure the changes don’t introduce incompatibilities. See 
http://docs.python 
.org/library/test.html
for details.
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Considering the Standard Library Features
 
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Standard Library files that have a .pyc extension are Python-compiled files that 
contain byte code. You can’t read them, but they’re always accompanied by a .py 
file that you can read. The .pyc files are useful because they execute faster than the 
.py files because the interpreter doesn’t have to turn them into byte code first.