issue_comments: 365708385

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https://github.com/pydata/xarray/pull/1899#issuecomment-365708385 https://api.github.com/repos/pydata/xarray/issues/1899 365708385 MDEyOklzc3VlQ29tbWVudDM2NTcwODM4NQ== 291576 2018-02-14T18:55:43Z 2018-02-14T18:55:43Z CONTRIBUTOR

Just did some more debugging, putting in some debug statements within NioArrayWrapper.__getitem__(): ``` diff --git a/xarray/backends/pynio_.py b/xarray/backends/pynio_.py index c7e0ddf..b9f7151 100644 --- a/xarray/backends/pynio_.py +++ b/xarray/backends/pynio_.py @@ -27,16 +27,24 @@ class NioArrayWrapper(BackendArray): return self.datastore.ds.variables[self.variable_name]

 def __getitem__(self, key):
  • import logging
  • logger = logging.getLogger(name)
  • logger.addHandler(logging.NullHandler())
  • logger.debug("initial key: %s", key) key, np_inds = indexing.decompose_indexer(key, self.shape, mode='outer')
  • logger.debug("Decomposed indexers:\n%s\n%s", key, np_inds)
     with self.datastore.ensure_open(autoclose=True):
     array = self.get_array()
    • logger.debug("initial array: %r", array) if key == () and self.ndim == 0: return array.get_value()
       for ind in np_inds:
      • logger.debug("indexer: %s", ind) array = indexing.NumpyIndexingAdapter(array)[ind]

      • logger.debug("intermediate array: %r", array)

        return array

```

And here is the test script (data not included): import logging import xarray as xr logging.basicConfig(level=logging.DEBUG) fname1 = '../hrrr.t12z.wrfnatf02.grib2' ds = xr.open_dataset(fname1, engine='pynio') subset_isel = ds.isel(lv_HYBL0=7) sp = subset_isel['UGRD_P0_L105_GLC0'].values.shape

And here is the relevant output: DEBUG:xarray.backends.pynio_:initial key: BasicIndexer((slice(None, None, None),)) DEBUG:xarray.backends.pynio_:Decomposed indexers: BasicIndexer((slice(None, None, None),)) () DEBUG:xarray.backends.pynio_:initial array: <Nio.NioVariable object at 0x7f0f3c339210> DEBUG:xarray.backends.pynio_:initial key: BasicIndexer((slice(None, None, None),)) DEBUG:xarray.backends.pynio_:Decomposed indexers: BasicIndexer((slice(None, None, None),)) () DEBUG:xarray.backends.pynio_:initial array: <Nio.NioVariable object at 0x7f0f3c339b90> DEBUG:xarray.backends.pynio_:initial key: BasicIndexer((slice(None, None, None),)) DEBUG:xarray.backends.pynio_:Decomposed indexers: BasicIndexer((slice(None, None, None),)) () DEBUG:xarray.backends.pynio_:initial array: <Nio.NioVariable object at 0x7f0f3c339d50> DEBUG:xarray.backends.pynio_:initial key: BasicIndexer((slice(None, None, None),)) DEBUG:xarray.backends.pynio_:Decomposed indexers: BasicIndexer((slice(None, None, None),)) () DEBUG:xarray.backends.pynio_:initial array: <Nio.NioVariable object at 0x7f0f3c339d90> DEBUG:xarray.backends.pynio_:initial key: BasicIndexer((7, slice(None, None, None), slice(None, None, None))) DEBUG:xarray.backends.pynio_:Decomposed indexers: BasicIndexer((7, slice(None, None, None), slice(None, None, None))) () DEBUG:xarray.backends.pynio_:initial array: <Nio.NioVariable object at 0x7f0f3c339190> DEBUG:xarray.backends.pynio_:initial key: BasicIndexer((7, slice(None, None, None), slice(None, None, None))) DEBUG:xarray.backends.pynio_:Decomposed indexers: BasicIndexer((7, slice(None, None, None), slice(None, None, None))) () DEBUG:xarray.backends.pynio_:initial array: <Nio.NioVariable object at 0x7f0f3c339190> (50, 1059, 1799)

So, the BasicIndexer((7, slice(None, None, None), slice(None, None, None))) isn't getting decomposed correctly, it looks like?

 
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