Jython Essentials

by Pedroni, Samuele; Rappin, Noel; Hugunin, Jim

• ISBN13: 9780596002473
• ISBN10: 0596002475
• Edition: 1st
• Format: Paperback
• Copyright: 2002-03-01
• Publisher: Oreilly & Associates Inc

Summary

Jython is an implementation of the Python programming language written in Java, allowing Python programs to integrate seamlessly with any Java code. The secret to Jython's popularity lies in the combination of Java's libraries and tools with Python's rapid development capabilities. Jython Essentials provides a solid introduction to the language, numerous examples of Jython/Java interaction, and valuable reference material on modules and libraries of use to Jython programmers.

Author Biography

Samuele Pedroni is one of the main Jython developers. He holds a CS flavored diploma in mathematics from the ETH Zurich (Swiss institute of technology in Zurich). He is now a teacher and research assistant at the Institute of Theoretical CS. He plans to come to the US for a PhD in the field of dynamic languages and dynamic compilation. He came to Jython with the interest in improving it with respect to Java importing and reloading. He has developed several important patches related to java integration, classloaders, and the reworking of java/python importing rules and design.

Noel Rappin has a Ph.D. in computer science from the Georgia Institute of Technology, where his research included methods for teaching Object-Oriented Programming and Design. He has extensive production experience in both Java and Python. Noel also contributed an introductory chapter to the book Squeak: Open Personal Computing and Multimedia (PH).

Table of Contents

Foreword	ix
Preface	xiii
Introduction to Jython	1	(15)
Jython Requirements	1	(1)
Welcome to Jython	2	(5)
What's Jython Good For?	7	(2)
The Benefits of Jython	9	(4)
The Speed Question	13	(1)
The Rest of the Book	14	(2)
Jython Basics	16	(30)
Running Jython	16	(2)
Basic Types	18	(2)
Operators	20	(2)
Numeric Types	22	(3)
Sequences: Lists and Tuples	25	(8)
Strings	33	(7)
Mappings and Dictionaries	40	(4)
Jython Files	44	(2)
Jython Control Flow	46	(20)
Statements and Expressions	46	(1)
Assignment	47	(4)
Printing	51	(1)
Blocks	52	(2)
Conditional Logic	54	(2)
Loops	56	(2)
List Comprehensions	58	(3)
Exceptions	61	(2)
Evaluating Code Dynamically	63	(3)
Modules and Functions	66	(17)
Modules	66	(2)
Functions	68	(1)
Parameter Passing with Style	69	(8)
Import Statements and Packages	77	(6)
Object-Oriented Jython	83	(21)
Creating Classes	83	(2)
Methods	85	(4)
Classes, Instances, and Access Control	89	(7)
Inheritance	96	(2)
Special Methods	98	(6)
Using Java from Jython	104	(16)
Basic Object Usage	104	(3)
Automatic Type Conversion	107	(5)
Java Arrays and the jarray Module	112	(3)
Java-co-Python Types: Automatic Conversion	115	(2)
Collection Wrappers	117	(1)
Avoiding Name Collisions	117	(3)
Inheriting from lava	120	(11)
Basic Mechanics	121	(2)
Java Interoperation and Overriding	123	(4)
Calling Super Methods and Constructors	127	(4)
Reflection and JavaBeans	131	(13)
Bean-Based Reflection	132	(6)
Python-Based Reflection	138	(6)
Using Swing	144	(17)
Java Versus Jython	145	(4)
A Calculator	149	(3)
An HTML Browser	152	(3)
An HTML Source Browser	155	(6)
Using Java Libraries	161	(17)
JDBC and the Python Database API	161	(4)
Servlets and PyServlet	165	(5)
Jython and XML	170	(8)
Jython Standard Library	178	(25)
Using Python Modules	178	(1)
System and File Modules	179	(8)
Regular Expressions	187	(7)
Serialization and Pickling	194	(3)
Unit Testing with PyUnit	197	(6)
Embedding Jython Inside Java	203	(15)
Setting Up an Interpreter	204	(2)
Executing Code	206	(2)
Accessing the Interpreter Namespace	208	(1)
Using PyObjects	209	(2)
PyObject Subclasses	211	(3)
Catching Exceptions	214	(1)
Embedding Examples	214	(4)
Compiling Jython	218	(13)
Why Compile?	218	(2)
The Compiler in Action	220	(4)
Packaging in Java Archives	224	(1)
Using Jython in Java	225	(4)
A Simple Applet	229	(2)
A. Installing Jython	231	(3)
B. Jython Options and Registry	234	(6)
C. Jython Exceptions	240	(4)
D. Jython and CPython Differences	244	(6)
E. Java-to-Python Quick Reference	250	(7)
Index	257