By Alan Harris
IronPython represents a distinct course for builders drawn to operating with dynamic languages in the .NET Framework. no matter if you are looking to improve functions from scratch or upload performance and maintainability to an current software, IronPython opens many doorways whereas offering a high–speed, high–performance language that integrates tightly with different .NET languages.
- Learn to create functions utilizing some great benefits of a dynamically typed language.
- Discover how you can leverage the ability of IronPython to enhance current purposes.
- Explore interacting with different .NET languages via invoking the typical language runtime.
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There is a difference between handling exceptions and validating data entry. We have conditional statements in Listing 2-8 to handle direction of the program under normal circumstances. A user’s entering the string “twenty-five” for his or her age is not a normal circumstance by our definition, so we have an exception to handle it. Exceptions are “heavier” than conditional statements and have a slightly larger impact on performance. By definition, they should be exceptional cases, not the way you control program flow.
You will see something like the following. py', line 4, in HelloConditional ValueError: invalid integer number literal Yikes! We didn’t even get asked for our name and age again. It just crashed and burned! This is an example of an exception. An exception occurs when program execution strays far off course. A pretty common example would be dividing by 0. Many 23 24 Ch apt er 2 ■ IR ONP YTHON S YNTAX languages (C#, for example) even have built-in DivideByZero exceptions to handle those types of cases.
To the user, and I’m not about to break tradition. nNote Totally random trivia: the archetype of the Hello World! programs is actually “The C Programming Language” by Brian Kernighan and Dennis Ritchie. Since the book in your hands is about IronPython, which is based on CPython, which was written in and (in part) modeled after the C language syntax, it seems only fitting to keep the tradition alive. py in a convenient directory. For the sake of our examples in this book, I will be keeping my source code in C:\Python.