I have some significantly extended syntax for Python that I need to create a reference implementation for. My new syntax includes new keywords, statements and objects that are sort of like classes but not really. The implementation is all possible using standard Python, but the implementation isn't the point of what I'm doing. Speed and having an extra step to run a program are not issues that I need to be concerned with. I'd like to create a preprocessor if possible, because it would probably be easier than implementing the changes in the interpreter. I could just drop in standard Python code that provides the functionality when I encounter a part of my extended syntax. Modifying the interpreter, on the other hand, sounds like it would be pretty nasty, even though I have experience in interpreter hacking already. So my question is: what's the easiest way to implement a preprocessor system in Python? I understand I could use the tokenize module, but that would still require a lot of manual parsing of the Python syntax. Is it possible to use any of the parser module facilities to accomplish this without them choking on the unknown syntax? Or, alternatively, would modifying the interpreter ultimately be easier?
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