dequote.py

import sys
tr = [
    (u'\u2018', "`"),
    (u'\u2019',"'"),
    (u'\u201c', "``"),
    (u'\u201d', "''")
    ]
s = sys.stdin.read().decode('utf8')
for a, b in tr:
    s = s.replace(a, b)
sys.stdout.write(s.encode('latin1'))