code: def is_blacklisted_import(importer, fullname):
      
      return ((not any(fullname.startswith(s) for s in importer.whitelist)) or
                  (any(fullname.startswith(s) for s in importer.blacklist)))
docs: Return :data:`True` if `fullname` is part of a blacklisted package, or if
      any packages have been whitelisted and `fullname` is not part of one.
  
      NB:
        - If a package is on both lists, then it is treated as blacklisted.
        - If any package is whitelisted, then all non-whitelisted packages are
          treated as blacklisted.