[Python-ideas] Statements vs Expressions... why?

Cliff Wells cliff at develix.com
Mon Sep 15 05:48:47 CEST 2008

On Mon, 2008-09-15 at 14:23 +1200, Greg Ewing wrote:
> Leonardo Santagada wrote:
> > The only clean way to support DSL in python in my view would be to  
> > support something like pyparsing or ANTLR and make it generate a  parser 
> > and some simple form of compilation to python bytecodes. How  can we 
> > support that? Is this even desired?
> The way to go is probably to have the parser build an AST.
> That way you get to reuse the compiler machinery for generating
> bytecode, without having to worry about the messy details
> of generating textual Python source.

This is the approach Logix took, which is probably why it no longer
works under Python 2.5.  This is exactly why I find this type of
approach unappealing (vs writing an internal DSL).

I'm not sure what approach EasyExtend takes, but it's another potential
player in this field:



More information about the Python-ideas mailing list