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(python2.1-lib.info)Exceptions and Error Handling


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Exceptions and Error Handling
-----------------------------

The parser module defines a single exception, but may also pass other
built-in exceptions from other portions of the Python runtime
environment.  See each function for information about the exceptions it
can raise.

`ParserError'
     Exception raised when a failure occurs within the parser module.
     This is generally produced for validation failures rather than the
     built in `SyntaxError' thrown during normal parsing.  The
     exception argument is either a string describing the reason of the
     failure or a tuple containing a sequence causing the failure from
     a parse tree passed to `sequence2ast()' and an explanatory string.
     Calls to `sequence2ast()' need to be able to handle either type
     of exception, while calls to other functions in the module will
     only need to be aware of the simple string values.

Note that the functions `compileast()', `expr()', and `suite()' may
throw exceptions which are normally thrown by the parsing and
compilation process.  These include the built in exceptions
`MemoryError', `OverflowError', `SyntaxError', and `SystemError'.  In
these cases, these exceptions carry all the meaning normally associated
with them.  Refer to the descriptions of each function for detailed
information.


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