def get_ISBNs(self):
invalid_isbns = set(self.get_invalid_ISBNs())<EOL>valid_isbns = [<EOL>self._clean_isbn(isbn)<EOL>for isbn in self["<STR_LIT>"]<EOL>if self._clean_isbn(isbn) not in invalid_isbns<EOL>]<EOL>if valid_isbns:<EOL><INDENT>return valid_isbns<EOL><DEDENT>return [<EOL>self._clean_isbn(isbn)<EOL>for isbn in self["<STR_LIT>"]<EOL>]<EOL>
Get list of VALID ISBN.

Returns:
    list: List with *valid* ISBN strings.