def set_seq1(self, a):
if a is self.a:<EOL><INDENT>return<EOL><DEDENT>self.a = a<EOL>if not isinstance(self.a, list):<EOL><INDENT>self.a = list(self.a)<EOL><DEDENT>[hash(x) for x in self.a]<EOL>
Same as SequenceMatcher.set_seq1, but check for non-list inputs
        implementation.