pandas.api.extensions.ExtensionArray.isna — pandas 2.2.3 documentation (original) (raw)

ExtensionArray.isna()[source]#

A 1-D array indicating if each value is missing.

Returns:

numpy.ndarray or pandas.api.extensions.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.

Notes

If returning an ExtensionArray, then

• na_values._is_boolean should be True
• na_values should implement ExtensionArray._reduce()
• na_values.any and na_values.all should be implemented

Examples

arr = pd.array([1, 2, np.nan, np.nan]) arr.isna() array([False, False, True, True])