Parsing TeX is definitely not for the faint-of-heart! You might try
something like QuotedString('$', escQuote='$$') in pyparsing. (I've
not poked at TeX or its ilk since the mid-80's so my TeXpertise is
long rusted away.)
I know of two projects that have taken on the problem using pyparsing
- one is the mathtext module in John Hunter's matplotlib, and Tim
Arnold posted some questions on the subject a while back - try
googling for "pyparsing tex" for further leads.
-- Paul
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