I have this string:
V posledn\\u00edch m\\u011bs\\u00edc\\u00edch se bezpe\\u010dnostn\\u00ed situace v Libyi zna\\u010dn\\u011b zhor\\u0161ila, o \\u010dem\
Decode it using the 'unicode-escape' codec. If x is your string, x.decode('unicode-escape').
'unicode-escape'
x
x.decode('unicode-escape'
If it is Javascript code, then perhaps it's actually JSON, and you can use json.loads to decode it.
json.loads