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Is there a parser that:

  • is able to parse Python2.6+ code, and
  • can be run in Python2.5 (python-only, no C extensions allowed)?

NOTE: This is somewhat related to my previous quostion about class decorators.

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Yes, lib2to3 can, all you need to do is to provide it with the right Grammar file (get the source code for the Python you want and copy Grammar/Grammar).

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Thanks for the tip. I've created some simple fixers that convert Python 2.7 code to Python 2.5 using lib2to3 from the 2.7 stdlib, and an import hook that does the conversion on-the-fly: github.com/aatiis/seven

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