prepare_tex.py

#!/usr/bin/python
# prepare_tex.py

import sys
import re

def cat(fn):
    return open(fn, 'rt').read().replace('\\', '====')

def prepare_tex(fn):
    r = cat(fn)
    for s in re.findall(r'====input{([-a-zA-Z._0-9/]*)}', r):
    cs = prepare_tex(s)
    r = re.sub(r'====input{' + s + '}', cs, r)
    return r

print prepare_tex(sys.argv[1]).replace('====', '\\')