def get_columns(self):
return github.PaginatedList.PaginatedList(<EOL>github.ProjectColumn.ProjectColumn,<EOL>self._requester,<EOL>self.columns_url,<EOL>None,<EOL>{"<STR_LIT>": Consts.mediaTypeProjectsPreview}<EOL>)<EOL>
:calls: `GET /projects/:project_id/columns <https://developer.github.com/v3/projects/columns/#list-project-columns>`_
:rtype: :class:`github.PaginatedList.PaginatedList` of :class:`github.ProjectColumn.ProjectColumn`