pandas 1.4.2

NotesParametersReturnsBackRef
factorize(self, na_sentinel: 'int' = -1) -> 'tuple[np.ndarray, ExtensionArray]'

Notes

pandas.factorize offers a sort keyword as well.

Parameters

na_sentinel : int, default -1

Value to use in the :None:None:`codes` array to indicate missing values.

Returns

codes : ndarray

An integer NumPy array that's an indexer into the original ExtensionArray.

uniques : ExtensionArray

An ExtensionArray containing the unique values of :None:None:`self`.

note

uniques will not contain an entry for the NA value of the ExtensionArray if there are any missing values present in :None:None:`self`.

Encode the extension array as an enumerated type.

See Also

factorize

Top-level factorize method that dispatches here.

Examples

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

pandas.core.arrays.base.ExtensionArray.factorize

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File: /pandas/core/arrays/base.py#983
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