re and escape character

[Sinan Nalkaya]

i re-format incoming messages like this,
command = re.findall("^\002(.{2})\|.*\003$", response)[0]
it works well but when response comes with escape characters , my 
command variable crashes,
i cannot parse if response variable is like ,
response = '\002AB|TIasdasdasd
asdasdasd
xzczxc
qwewer
werwer|\003'

ps:there must be \002 at the start and \003 at the end.
thanks.