{"action":"created","issue":{"url":"https://api.github.com/repos/pydata/pandas/issues/9918","labels_url":"https://api.github.com/repos/pydata/pandas/issues/9918/labels{/name}","comments_url":"https://api.github.com/repos/pydata/pandas/issues/9918/comments","events_url":"https://api.github.com/repos/pydata/pandas/issues/9918/events","html_url":"https://github.com/pydata/pandas/issues/9918","id":69024608,"number":9918,"title":"uint64 multicolumn 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uint64 columns is incorrect when sorting on multiple columns:\r\n\r\n```python\r\n>>> import pandas as pd\r\n>>> import numpy as np\r\n>>> df = pd.DataFrame({'a': pd.Series([18446637057563306014, 1162265347240853609]), 'b': pd.Series([1, 2])})\r\n>>> df['a'] = df['a'].astype(np.uint64)\r\n>>> df.sort(['a', 'b'])['a']\r\n0    18446637057563306014\r\n1     1162265347240853609\r\nName: a, dtype: uint64\r\n>>> df.sort(['a'])['a']\r\n1     1162265347240853609\r\n0    18446637057563306014\r\nName: a, dtype: uint64\r\n>>> pd.show_versions()\r\n\r\nINSTALLED VERSIONS\r\n------------------\r\ncommit: None\r\npython: 2.7.9.final.0\r\npython-bits: 64\r\nOS: Linux\r\nOS-release: 2.6.32-40.87-jump1.03\r\nmachine: x86_64\r\nprocessor:\r\nbyteorder: little\r\nLC_ALL: None\r\nLANG: en_US.UTF-8\r\n\r\npandas: 0.15.2\r\nnose: 1.3.4\r\nCython: None\r\nnumpy: 1.9.1\r\nscipy: 0.15.1\r\nstatsmodels: None\r\nIPython: 2.3.1\r\nsphinx: None\r\npatsy: None\r\ndateutil: 2.4.0\r\npytz: 2014.10\r\nbottleneck: None\r\ntables: None\r\nnumexpr: 2.4\r\nmatplotlib: 1.4.2\r\nopenpyxl: None\r\nxlrd: None\r\nxlwt: None\r\nxlsxwriter: None\r\nlxml: None\r\nbs4: 4.3.2\r\nhtml5lib: None\r\nhttplib2: None\r\napiclient: None\r\nrpy2: None\r\nsqlalchemy: None\r\npymysql: None\r\npsycopg2: None\r\n```"},"comment":{"url":"https://api.github.com/repos/pydata/pandas/issues/comments/93857430","html_url":"https://github.com/pydata/pandas/issues/9918#issuecomment-93857430","issue_url":"https://api.github.com/repos/pydata/pandas/issues/9918","id":93857430,"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},"created_at":"2015-04-16T22:56:06Z","updated_at":"2015-04-16T22:56:06Z","body":"``uint64`` not super-well supported; marked as a bug"}}