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need to rebase on master, that's the issue that was just merged","created_at":"2016-03-16T15:25:45Z","updated_at":"2016-03-16T15:25:45Z","html_url":"https://github.com/pydata/pandas/pull/12573#discussion_r56354024","pull_request_url":"https://api.github.com/repos/pydata/pandas/pulls/12573","_links":{"self":{"href":"https://api.github.com/repos/pydata/pandas/pulls/comments/56354024"},"html":{"href":"https://github.com/pydata/pandas/pull/12573#discussion_r56354024"},"pull_request":{"href":"https://api.github.com/repos/pydata/pandas/pulls/12573"}}},"pull_request":{"url":"https://api.github.com/repos/pydata/pandas/pulls/12573","id":62260593,"html_url":"https://github.com/pydata/pandas/pull/12573","diff_url":"https://github.com/pydata/pandas/pull/12573.diff","patch_url":"https://github.com/pydata/pandas/pull/12573.patch","issue_url":"https://api.github.com/repos/pydata/pandas/issues/12573","number":12573,"state":"open","locked":false,"title":"ENH: allow categoricals in 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