issue_comments: 135099870

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https://github.com/pydata/xarray/pull/551#issuecomment-135099870 https://api.github.com/repos/pydata/xarray/issues/551 135099870 MDEyOklzc3VlQ29tbWVudDEzNTA5OTg3MA== 5356122 2015-08-26T16:37:59Z 2015-08-26T16:37:59Z MEMBER

Were you planning on also adding these checks to the keys of a Dataset in this PR? Because I believe you can still do this:

c = xray.Dataset({'a': a, ('b', 'b'): b})

and it won't raise an error.

 
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