isna(self) -> 'np.ndarray | ExtensionArraySupportsAnyAll'
If returning an ExtensionArray, then
na_values._is_boolean
should be True
:None:None:`na_values` should implement ExtensionArray._reduce
na_values.any
and na_values.all
should be implemented
In most cases, this should return a NumPy ndarray. For exceptional cases like SparseArray
, where returning an ndarray would be expensive, an ExtensionArray may be returned.
A 1-D array indicating if each value is missing.
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