pandas.arrays.PandasArray.isna — pandas 0.24.0rc1 documentation (original) (raw)
A 1-D array indicating if each value is missing.
| Returns: | na_values : Union[np.ndarray, ExtensionArray] 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. |
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Notes
If returning an ExtensionArray, then
na_values._is_booleanshould be True- na_values should implement
ExtensionArray._reduce() na_values.anyandna_values.allshould be implemented