html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/1622#issuecomment-338302676,https://api.github.com/repos/pydata/xarray/issues/1622,338302676,MDEyOklzc3VlQ29tbWVudDMzODMwMjY3Ng==,2443309,2017-10-20T19:35:11Z,2017-10-20T19:35:11Z,MEMBER,closed via Unidata/netcdf4-python#727,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,264322686
https://github.com/pydata/xarray/pull/1622#issuecomment-337351475,https://api.github.com/repos/pydata/xarray/issues/1622,337351475,MDEyOklzc3VlQ29tbWVudDMzNzM1MTQ3NQ==,2443309,2017-10-17T19:57:00Z,2017-10-17T19:57:00Z,MEMBER,see https://github.com/Unidata/netcdf4-python/pull/727,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,264322686
https://github.com/pydata/xarray/pull/1622#issuecomment-335589665,https://api.github.com/repos/pydata/xarray/issues/1622,335589665,MDEyOklzc3VlQ29tbWVudDMzNTU4OTY2NQ==,2443309,2017-10-10T19:58:20Z,2017-10-10T19:58:20Z,MEMBER,"@shoyer - I think this is about as good as we can do:

Here's what's happening:
- netcdf4 is raising an `IOError` when the file is not found: https://github.com/Unidata/netcdf4-python/blob/3da921e93f158f6e443bbb9c8bfdfe681fac4351/netCDF4/_netCDF4.pyx#L2011
- but the error number is not being passed correctly to `IOError` so depending if we're on python 2 or 3, it seems this gets cast to either a `IOError` (py2) or a `OSError` (py3): 
https://github.com/Unidata/netcdf4-python/blob/3da921e93f158f6e443bbb9c8bfdfe681fac4351/netCDF4/_netCDF4.pyx#L1631-L1634

In my last commit, I think we can just catch the `IOError` and reraise a `IOError` (looks like `FileNotFoundError` on python3.

This got more complicated than it need to but I'm pretty confident this works.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,264322686