def save(self, commit=True):
        """
        Saves granted permissions and removes those switched off.
        """
        member, project = self.membership.member, self.membership.project

        granted_perms = self.cleaned_data['permissions']
        logging.info("Granted perms: %s" % granted_perms)
        member_perms = get_perms(member, project)
        # Grant permissions
        for perm in granted_perms:
            if perm is member_perms:
                assign(perm, member, project)
                self._message('info', _("Permission added: %s" % perm))
        # Remove permissions
        for perm in member_perms:
            if perm not in granted_perms:
                remove_perm(perm, member, project)
                # notify user if perm is still granted by member's groups
                groups_with_perm = member.groups.filter(
                    groupobjectpermission__permission__codename=perm)
                if groups_with_perm:
                    messages.warning(self.request, _("Permission %(perm)s is "
                        "still granted for %(user)s as following group(s) "
                        "has/have it: %(groups)s" % {
                            'perm': perm,
                            'user': member,
                            'groups': ', '.join(
                                (str(group) for group in groups_with_perm)
                            )
                        }))
                self._message('warning', _("Permission removed: %s" % perm))
dataset/ETHPy150Open lukaszb/django-projector/projector/forms.py/ProjectMembershipPermissionsForm.save/operator `not in` -> `is`