pandoc filter to convert $..$ and $$...$$ math to \\(..\\) and \\[...\\] respectively.

pandoc_filter_math2doublebackslashmath.py

#!/usr/bin/env python2
r"""
Use via ``pandoc --filter pandoc_filter_math2doublebackslashmath.py``
to convert math (in any syntax pandoc will recognize) 
to \\(..\\) and \\[...\\] syntaxes (``tex_math_double_backslash`` extension).
"""

from pandocfilters import toJSONFilter, Math, RawInline, RawBlock
import sys, json

def math2math(key, value, format, meta):
    if key == 'Math':
        #print >>sys.stderr, key, value, format#, meta
        [flavor, formula] = value
        if format == 'latex':
            format = 'tex'
        if flavor['t'] == 'InlineMath':
            return RawInline(format, r'\\(' + formula + r'\\)')
        elif flavor['t'] == 'DisplayMath':
            return RawInline(format, r'\\[' + formula + r'\\]')

if __name__ == '__main__':
    toJSONFilter(math2math)