Pre-Packaged Python - ZopeEver wondered if there was a way to stop Zope from barfing error messages all over your screen when one of your scripts crashes and burns? Well, guess what - there is! Meet the and tags, which can be used to trap and resolve errors in script execution.
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There are a number of standard exceptions are built into Python (and, therefore, Zope and DTML). Here they are: IOError - generated when an I/O operation fails; ImportError - generated when a module import fails; IndexError - generated when an attempt is made to access a non-existent element index; KeyError - generated when an attempt is made to access a non-existent dictionary key; MemoryError - generated when an out-of-memory error occurs; NameError - generated when an attempt is made to access a non-existent variable; SyntaxError - generated when the interpreter finds a syntax error; TypeError - generated when an attempt is made to run an operation on an incompatible object type; ZeroDivisionError - generated when an attempt is made to divide by zero. For a complete list, take a look at http://www.python.org/doc/current/lib/module-exceptions.html
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DTML Basics (part 4)
