The Greps of Wrath
This chapter continues our exploration of systems programming case studies. Here, the focus is on Python scripts that perform more advanced kinds of file and directory processing. The examples in this chapter do system-level tasks such as converting files, comparing and copying directories, and searching files and directories for strings -- a task idiomatically known as "grepping."
Most of the tools these scripts employ were introduced in Chapter 2. Here, the goal is to show these tools in action, in the context of more useful and realistic programs. As in the prior chapter, learning about Python programming techniques such as OOP and encapsulation is also a hidden subgoal of most of the examples presented here.
Introducing Python
- And Now for Something Completely Different
- The Life of Python
- The Compulsory Features List
- Whats Python Good For?
- Whats Python Not Good For?
Part I: System Interfaces
System Tools
- The os.path to Knowledge
- Why Python Here?
- System Scripting Overview
- The sys Module
- The os Module
- Script Execution Context
- Current Working Directory
- Command-Line Arguments
- Shell Environment Variables
- Standard Streams
- File Tools
- Directory Tools
Parallel System Tools
- Telling the Monkeys What to Do
- Forking Processes
- Threads
- Program Exits
- Interprocess Communication
- Pipes
- Signals
- Launching Programs on Windows
- Other System Tools
Larger System Examples I
- Splits and Joins and Alien Invasions
- Splitting and Joining Files
- Generating Forward-Link Web Pages
- A Regression Test Script
- Packing and Unpacking Files
- User-Friendly Program Launchers
Larger System Examples II
- The Greps of Wrath
- Fixing DOS Line Ends
- Fixing DOS Filenames
- Searching Directory Trees
- Visitor: Walking Trees Generically
- Copying Directory Trees
- Deleting Directory Trees
- Comparing Directory Trees
Part II: GUI Programming
Graphical User Interfaces
- Heres Looking at You, Kid
- Python GUI Development Options
- Tkinter Overview
- Climbing the GUI Learning Curve
- The End of the Tutorial
- Python/Tkinter for Tcl/Tk Converts
A Tkinter Tour, Part 1
- Widgets and Gadgets and GUIs, Oh My!
- Configuring Widget Appearance
- Toplevel Windows
- Dialogs
- Binding Events
- Message and Entry
- Checkbutton, Radiobutton, and Scale
- Running GUI Code Three Ways
- Images
A Tkinter Tour, Part 2
- On Todays Menu: Spam, Spam, and Spam
- Menus
- Listboxes and Scrollbars
- Text
- Canvas
- Grids
- Time Tools, Threads, and Animation
- The End of the Tour
- The PyDemos and PyGadgets Launchers
Larger GUI Examples
- Building a Better Mouse Trap
- Advanced GUI Coding Techniques
- Complete Program Examples
- PyEdit: A Text Editor Program/Object
- PyView: An Image and Notes Slideshow
- PyDraw: Painting and Moving Graphics
- PyClock: An Analog/Digital Clock Widget
- PyToe: A Tic-Tac-Toe Game Widget
- Where to Go from Here
Part III: Internet Scripting
Network Scripting
- Tune in, Log on, and Drop out
- Plumbing the Internet
- Socket Programming
- Handling Multiple Clients
- A Simple Python File Server
Client-Side Scripting
- Socket to Me!
- Transferring Files over the Net
- Processing Internet Email
- The PyMailGui Email Client
- Other Client-Side Tools
Server-Side Scripting
- Oh What a Tangled Web We Weave
- Whats a Server-Side CGI Script?
- Climbing the CGI Learning Curve
- The Hello World Selector
- Coding for Maintainability
- More on HTML and URL Escapes
- Sending Files to Clients and Servers
Larger Web Site Examples I
- Things to Do When Visiting Chicago
- The PyMailCgi Web Site
- The Root Page
- Sending Mail by SMTP
- Reading POP Email
- Utility Modules
- CGI Script Trade-offs
Larger Web Site Examples II
- Typos Happen
- The PyErrata Web Site
- The Root Page
- Browsing PyErrata Reports
- Submitting PyErrata Reports
- PyErrata Database Interfaces
- Administrative Tools
- Designing for Reuse and Growth
Advanced Internet Topics
- Surfing on the Shoulders of Giants
- Zope: A Web Publishing Framework
- HTMLgen: Web Pages from Objects
- JPython ( Jython): Python for Java
- Grail: A Python-Based Web Browser
- Python Restricted Execution Mode
- XML Processing Tools
- Windows Web Scripting Extensions
- Python Server Pages
- Rolling Your Own Servers in Python
Part IV: Assorted Topics
Databases and Persistence
- Give Me an Order of Persistence, but Hold the Pickles
- Persistence Options in Python
- DBM Files
- Pickled Objects
- Shelve Files
- SQL Database Interfaces
- PyForm: A Persistent Object Viewer
Data Structures
- Roses Are Red, Violets Are Blue; Lists Are Mutable, and So Is Class Foo
- Implementing Stacks
- Implementing Sets
- Binary Search Trees
- Graph Searching
- Reversing Sequences
- Permuting Sequences
- Sorting Sequences
- Data Structures Versus Python Built-ins
- PyTree: A Generic Tree Object Viewer
Text and Language
- See Jack Hack. Hack, Jack, Hack
- Strategies for Parsing Text in Python
- String Module Utilities
- Regular Expression Matching
- Parser Generators
- Hand-Coded Parsers
- PyCalc: A Calculator Program/Object
Part V: Integration
Extending Python
- Extending Python
- I Am Lost at C
- C Extensions Overview
- A Simple C Extension Module
- The SWIG Integration Code Generator
- Wrapping C Environment Calls
- A C Extension Module String Stack
- A C Extension Type String Stack
- Wrapping C++ Classes with SWIG
Embedding Python
- Embedding Python
- Add Python. Mix Well. Repeat.
- C Embedding API Overview
- Basic Embedding Techniques
- Registering Callback Handler Objects
- Using Python Classes in C
- ppembed: A High-Level Embedding API
- Other Integration Topics
VI: The End
Conclusion Python and the Development Cycle
- Conclusion Python and the Development Cycle
- That s the End of the Book, Now Here s the Meaning of Life
- Something s Wrong with the Way We Program Computers
- The Gilligan Factor
- Doing the Right Thing
- Enter Python
- But What About That Bottleneck?
- On Sinking the Titanic
- So What s Python The Sequel
- In the Final Analysis
- Postscript to the Second Edition
- Appendix A Recent Python Changes
- Section A.1. Major Changes in 2.0
- Section A.2. Major Changes in 1.6
- Section A.3. Major Changes Between 1.3 and 1.5.2
- Appendix B Pragmatics
- Section B.1. Installing Python
- Section B.2. Book Examples Distribution
- Section B.3. Environment Configuration
- Section B.4. Running Python Programs
- Section B.5. Python Internet Resources
- Appendix C. Python Versus C++
EAN: 2147483647
Pages: 245
