def remove(self, elem):
        """Remove a requirement.

        :param elem: a string or :class:`Requirement` instance.
        """
        if isinstance(elem, text_type):
            for requirement in self:
                if requirement.package == elem:
                    return super(Requirements, self).remove(requirement)
        return super(Requirements, self).remove(elem)
def display_name(self):
        """
        Find the most appropriate display name for a user: look for a "display_name", then
        a "real_name", and finally fall back to the always-present "name".
        """
        for k in self._NAME_KEYS:
            if self._raw.get(k):
                return self._raw[k]
            if "profile" in self._raw and self._raw["profile"].get(k):
                return self._raw["profile"][k]
        return self._raw["name"]