code: def extended_path(self):
          
          if self.is_absolute() and not self.path.startswith("\\\\"):
              return "\\\\?\\%s" % self.path
          return self.path
docs: Add prefix \\?\ to every absolute path, so that it's a "extended-length"
          path, that should be longer than 259 characters (called: "MAX_PATH")
          see:
          https://msdn.microsoft.com/en-us/library/aa365247.aspx#maxpath