{"action":"created","comment":{"url":"https://api.github.com/repos/pydata/pandas/pulls/comments/61602853","id":61602853,"diff_hunk":"@@ -4283,8 +4283,16 @@ def _align_series(self, other, join='outer', axis=None, level=None,\n \n         Parameters\n         ----------\n-        cond : boolean %(klass)s or array\n-        other : scalar or %(klass)s\n+        cond : boolean %(klass)s, array or callable\n+            If cond is callable, it is computed on the %(klass)s and\n+            should return boolean %(klass)s or array.\n+            The callable must not change input %(klass)s","path":"pandas/core/generic.py","position":9,"original_position":9,"commit_id":"b52d5d98dfd3024907eb128460fd912da738deda","original_commit_id":"b52d5d98dfd3024907eb128460fd912da738deda","user":{"login":"jreback","id":953992,"avatar_url":"https://avatars.githubusercontent.com/u/953992?v=3","gravatar_id":"","url":"https://api.github.com/users/jreback","html_url":"https://github.com/jreback","followers_url":"https://api.github.com/users/jreback/followers","following_url":"https://api.github.com/users/jreback/following{/other_user}","gists_url":"https://api.github.com/users/jreback/gists{/gist_id}","starred_url":"https://api.github.com/users/jreback/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jreback/subscriptions","organizations_url":"https://api.github.com/users/jreback/orgs","repos_url":"https://api.github.com/users/jreback/repos","events_url":"https://api.github.com/users/jreback/events{/privacy}","received_events_url":"https://api.github.com/users/jreback/received_events","type":"User","site_admin":false},"body":"you can do\r\n\r\n```\r\n<blank line>\r\n<indent here>versionadded: 0.18.1\r\n<blank line>\r\n<indent here>comment here\r\n```\r\n\r\nI think\r\n\r\n@jorisvandenbossche ","created_at":"2016-04-29T16:13:28Z","updated_at":"2016-04-29T16:13:28Z","html_url":"https://github.com/pydata/pandas/pull/12539#discussion_r61602853","pull_request_url":"https://api.github.com/repos/pydata/pandas/pulls/12539","_links":{"self":{"href":"https://api.github.com/repos/pydata/pandas/pulls/comments/61602853"},"html":{"href":"https://github.com/pydata/pandas/pull/12539#discussion_r61602853"},"pull_request":{"href":"https://api.github.com/repos/pydata/pandas/pulls/12539"}}},"pull_request":{"url":"https://api.github.com/repos/pydata/pandas/pulls/12539","id":61831124,"html_url":"https://github.com/pydata/pandas/pull/12539","diff_url":"https://github.com/pydata/pandas/pull/12539.diff","patch_url":"https://github.com/pydata/pandas/pull/12539.patch","issue_url":"https://api.github.com/repos/pydata/pandas/issues/12539","number":12539,"state":"open","locked":false,"title":"ENH: Allow where/mask/Indexers to accept callable","user":{"login":"sinhrks","id":1696302,"avatar_url":"https://avatars.githubusercontent.com/u/1696302?v=3","gravatar_id":"","url":"https://api.github.com/users/sinhrks","html_url":"https://github.com/sinhrks","followers_url":"https://api.github.com/users/sinhrks/followers","following_url":"https://api.github.com/users/sinhrks/following{/other_user}","gists_url":"https://api.github.com/users/sinhrks/gists{/gist_id}","starred_url":"https://api.github.com/users/sinhrks/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sinhrks/subscriptions","organizations_url":"https://api.github.com/users/sinhrks/orgs","repos_url":"https://api.github.com/users/sinhrks/repos","events_url":"https://api.github.com/users/sinhrks/events{/privacy}","received_events_url":"https://api.github.com/users/sinhrks/received_events","type":"User","site_admin":false},"body":" - [x] closes #12533\r\n - [x] closes #11485 \r\n - [x] tests added / passed\r\n - [x] passes ``git diff upstream/master | flake8 --diff``\r\n - [x] whatsnew entry\r\n\r\n\r\nCurrent impl is very simple like ``assign``. 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