Convert \uDDDD sequences to unicode

unicode-conv.py

#/usr/bin/env python
import sys, re

text = sys.stdin.read()
result = unicode()
unicode_char_re = re.compile(r'\\u[0-9a-fA-F]{4}')
prev_pos = 0
for m in unicode_char_re.finditer(text):
    span = m.span()
    result += text[prev_pos:span[0]]
    char = text[span[0]:span[1]]
    char = unichr(int(char[2:],16))
    result += char
    prev_pos = span[1]
result += text[prev_pos:]

print result.encode('utf-8')