isna(self) -> 'np.ndarray'
Missing values (-1 in .codes) are detected.
Detect missing values
Categorical.notna
Boolean inverse of Categorical.isna.
isna
Top-level isna.
isnull
Alias of isna.
The following pages refer to to this document either explicitly or contain code examples using this.
pandas.core.arrays.categorical.Categorical.isna
pandas.core.arrays.categorical.Categorical.notna
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