corruptsvg.py

import re, random, sys, os

def randrepl(matchobj):
    if "matrix" in s[matchobj.start()-30:matchobj.start()]: return matchobj.group(0)
    v = float(matchobj.group(2))
    v = random.gauss(v, 0.1)
    return matchobj.group(1)+"%.3f"%v

pat = re.compile("([, (])(-?[0-9]+(\.[0-9]+)?)")
s = open(sys.argv[1]).read()
for i in range(200):
    s = pat.sub(randrepl, s)
    open("%s-%03d.svg"%(os.path.splitext(sys.argv[1])[0], i), 'w').write(s)