Actionscript parsing experiences: PyBison & PLY

criminology dissertation gangs My experiments with text-parsing continue..

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indian pharmacy generic cialis PyBison essay writer magic Last day I founded a python library (pybison) which runs the generated python parser at near the speed of C-based parsers, due to direct hooks into bison-generated C code. Cool, unfortunately I couldn’t compiled it for Windows and so I made my test on Ubuntu only. What I did was just to export the already written lexer/grammar using bison2py (boundled with pybison) and run it.

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conclusion dissertation philosophique mthode If you want to take a look at the python parser try it by downloading the source code here. The file accept these parameters: how to write a good application essay essay literature review pay You can download the source code here sql assignments

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The second test I did was using PLY, an implementation of lex and yacc parsing tools for Python. Being implemented entirely in python it should be much more slower that pybison, but I didn’t find any difference with the pybison parser version. In fact PLY , like the traditional bison, creates tables starting from the grammar syntax.
Ok, Both of the implementations are slower that the pure C parser, but extremely faster that antlr!
(They took more or less 0.02 to 0.5 secs for parsing and generating the AST.)
Unlike pybison PLY is still mantained and offers more features and a better error handling.. even if the whole grammar has to be rewritten in python, and it can be compiled in Windows too.

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make an argument To run the test just write:

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arjun chowdhury dissertation P.S. Unfortunately the yacc parser isn’t yet complete because I still need to find a way for parsing correctly E4X and XML syntax.. dissertation limitations research