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BUG: Allow unsigned integer indexing, fixes #1405 #1406

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2 changes: 1 addition & 1 deletion xarray/core/indexing.py
Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,7 @@ def canonicalize(indexer):
'1d arrays')
if indexer.dtype.kind == 'b':
indexer, = np.nonzero(indexer)
elif indexer.dtype.kind != 'i':
elif indexer.dtype.kind not in 'ui':
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nit: this feels too cute. I suggest writing this as:

elif indexer.dtype.kind not in ['u', 'i']:

raise ValueError('invalid subkey %r for integer based '
'array indexing; all subkeys must be '
'slices, integers or sequences of '
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