code: def unicode_escape_sequence_fix(self, value):
          
  
          def fix_fn(match):
              # we don't escape an escaped backslash
              if match.group(0) == r"\\":
                  return r"\\"
              return match.group(0).encode("utf-8").decode("unicode-escape")
  
          return re.sub(r"\\\\|\\u\w{4}|\\U\w{8}|\\N\{([^}\\]|\\.)+\}", fix_fn, value)
docs: It is possible to define unicode characters in the config either as the
          actual utf-8 character or using escape sequences the following all will
          show the Greek delta character.
          Δ \N{GREEK CAPITAL LETTER DELTA} \U00000394  \u0394