def extract_users(self):
email_set = set()<EOL>users_dict = {}<EOL>self.verbose('<STR_LIT>')<EOL>for node in self.old_nodes:<EOL><INDENT>email_set.add(node.email)<EOL>if node.email not in users_dict:<EOL><INDENT>users_dict[node.email] = {<EOL>'<STR_LIT>': node.owner<EOL>}<EOL><DEDENT><DEDENT>self.email_set = email_set<EOL>self.users_dict = users_dict<EOL>self.verbose('<STR_LIT>' % len(email_set))<EOL>
extract user info