def add_to_assignees(self, *assignees):
assert all(isinstance(element, (github.NamedUser.NamedUser, str, unicode)) for element in assignees), assignees<EOL>post_parameters = {"<STR_LIT>": [assignee.login if isinstance(assignee, github.NamedUser.NamedUser) else assignee for assignee in assignees]}<EOL>headers, data = self._requester.requestJsonAndCheck(<EOL>"<STR_LIT:POST>",<EOL>self.url + "<STR_LIT>",<EOL>input=post_parameters<EOL>)<EOL>self._useAttributes(data)<EOL>
:calls: `POST /repos/:owner/:repo/issues/:number/assignees <https://developer.github.com/v3/issues/assignees>`_
:param assignee: :class:`github.NamedUser.NamedUser` or string
:rtype: None