Table of Contents. Dive Into Python...1

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2 ...1 Chapter 1. Installing Python Which Python is right for you? Python on Windows Python on Mac OS X Python on Mac OS Python on RedHat Linux Python on Debian GNU/Linux Python Installation from Source The Interactive Shell Summary...8 Chapter 2. Your First Python Program Diving in Declaring Functions Documenting Functions Everything Is an Object Indenting Code Testing Modules...14 Chapter 3. Native Datatypes Introducing Dictionaries Introducing Lists Introducing Tuples Declaring variables Formatting Strings Mapping Lists Joining Lists and Splitting Strings Summary...29 Chapter 4. The Power Of Introspection Diving In Using Optional and Named Arguments Using type, str, dir, and Other Built In Functions Getting Object References With getattr Filtering Lists The Peculiar Nature of and and or Using lambda Functions Putting It All Together Summary...45 Chapter 5. Objects and Object Orientation Diving In Importing Modules Using from module import Defining Classes Instantiating Classes Exploring UserDict: A Wrapper Class Special Class Methods Advanced Special Class Methods...59 i

3 Chapter 5. Objects and Object Orientation 5.8. Introducing Class Attributes Private Functions Summary...63 Chapter 6. Exceptions and File Handling Handling Exceptions Working with File Objects Iterating with for Loops Using sys.modules Working with Directories Putting It All Together Summary...78 Chapter 7. Regular Expressions Diving In Case Study: Street Addresses Case Study: Roman Numerals Using the {n,m} Syntax Verbose Regular Expressions Case study: Parsing Phone Numbers Summary...93 Chapter 8. HTML Processing Diving in Introducing sgmllib.py Extracting data from HTML documents Introducing BaseHTMLProcessor.py locals and globals Dictionary based string formatting Quoting attribute values Introducing dialect.py Putting it all together Summary Chapter 9. XML Processing Diving in Packages Parsing XML Unicode Searching for elements Accessing element attributes Segue Chapter 10. Scripts and Streams Abstracting input sources Standard input, output, and error Caching node lookups Finding direct children of a node Creating separate handlers by node type ii

4 Chapter 10. Scripts and Streams Handling command line arguments Putting it all together Summary Chapter 11. HTTP Web Services Diving in How not to fetch data over HTTP Features of HTTP Debugging HTTP web services Setting the User Agent Handling Last Modified and ETag Handling redirects Handling compressed data Putting it all together Summary Chapter 12. SOAP Web Services Diving In Installing the SOAP Libraries First Steps with SOAP Debugging SOAP Web Services Introducing WSDL Introspecting SOAP Web Services with WSDL Searching Google Troubleshooting SOAP Web Services Summary Chapter 13. Unit Testing Introduction to Roman numerals Diving in Introducing romantest.py Testing for success Testing for failure Testing for sanity Chapter 14. Test First Programming roman.py, stage roman.py, stage roman.py, stage roman.py, stage roman.py, stage Chapter 15. Refactoring Handling bugs Handling changing requirements Refactoring Postscript Summary iii

5 Chapter 16. Functional Programming Diving in Finding the path Filtering lists revisited Mapping lists revisited Data centric programming Dynamically importing modules Putting it all together Summary Chapter 17. Dynamic functions Diving in plural.py, stage plural.py, stage plural.py, stage plural.py, stage plural.py, stage plural.py, stage Summary Chapter 18. Performance Tuning Diving in Using the timeit Module Optimizing Regular Expressions Optimizing Dictionary Lookups Optimizing List Operations Optimizing String Manipulation Summary Appendix A. Further reading Appendix B. A 5 minute review Appendix C. Tips and tricks Appendix D. List of examples Appendix E. Revision history Appendix F. About the book Appendix G. GNU Free Documentation License G.0. Preamble G.1. Applicability and definitions G.2. Verbatim copying G.3. Copying in quantity G.4. Modifications G.5. Combining documents G.6. Collections of documents G.7. Aggregation with independent works iv

6 Appendix G. GNU Free Documentation License G.8. Translation G.9. Termination G.10. Future revisions of this license G.11. How to use this License for your documents Appendix H. Python license H.A. History of the software H.B. Terms and conditions for accessing or otherwise using Python v