replace fields in xml file

replacexmlfields.py

import re
import fileinput

i = 0
output = {}
def repl(m):
    global i
    global output
    i += 1
    output[i] = m.group(2)
    return m.group(1)+"%%replace{%i}" % i
for line in fileinput.input():
    print re.sub(r"(label=\")([^\"]*)", repl, line),

for key, value in output.iteritems():
    print str(key)+'\t'+value