issue_comments: 366586817

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https://github.com/pydata/xarray/pull/1905#issuecomment-366586817 https://api.github.com/repos/pydata/xarray/issues/1905 366586817 MDEyOklzc3VlQ29tbWVudDM2NjU4NjgxNw== 1217238 2018-02-19T04:35:09Z 2018-02-19T04:35:09Z MEMBER

My variable objects present a pure numpy array, so they follow numpy indexing precisely with one exception. If the files are actually netCDF4, they have the same limitations of the netCDF4.Variable object.

OK, we will need to surface this information in some way for xarray -- maybe as an attribute of some sort on the psuedonetcdf side? The good news is that we already have handling for indexing like NumPy arrays and netCDF4 variables, but we need to know which behavior to expect to make all of indexing operations work efficiently.

It's also safe to say for now that only basic indexing is supported, but that will result in sub-optimal indexing behavior ( slower and more memory intensive than necessary).

Note that we are currently in the process of refactoring how we handle indexers in backends, so you'll probably need to update things after https://github.com/pydata/xarray/pull/1899 is merged.

 
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