issue_comments: 295791392

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https://github.com/pydata/xarray/issues/1378#issuecomment-295791392 https://api.github.com/repos/pydata/xarray/issues/1378 295791392 MDEyOklzc3VlQ29tbWVudDI5NTc5MTM5Mg== 1217238 2017-04-20T15:59:40Z 2017-04-20T15:59:40Z MEMBER

I cannot see a use case in which repeated dims actually make sense.

Agreed. I would have disallowed them entirely, but sometimes it's useful to allow loading variables with duplicate dimensions, even if the only valid operation you can do is de-duplicate them.

Every routine that looks up dimensions by name should go through the get_axis_num method. That would be a good place to add a check for uniqueness.

 
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