code: def _find_link_target(self, tarinfo):
          
          if tarinfo.issym():
              # Always search the entire archive.
              linkname = os.path.dirname(tarinfo.name) + "/" + tarinfo.linkname
              limit = None
          else:
              # Search the archive before the link, because a hard link is
              # just a reference to an already archived file.
              linkname = tarinfo.linkname
              limit = tarinfo
  
          member = self._getmember(linkname, tarinfo=limit, normalize=True)
          if member is None:
              raise KeyError("linkname %r not found" % linkname)
          return member
docs: Find the target member of a symlink or hardlink member in the
             archive.