pandas.factorize

pandas.factorize(values, sort=False, order=None, na_sentinel=-1, size_hint=None)[source]

Encode input values as an enumerated type or categorical variable

Parameters:	values : ndarray (1-d) Sequence sort : boolean, default False Sort by values na_sentinel : int, default -1 Value to mark “not found” size_hint : hint to the hashtable sizer
Returns:	labels : the indexer to the original array uniques : ndarray (1-d) or Index the unique values. Index is returned when passed values is Index or Series note: an array of Periods will ignore sort as it returns an always sorted PeriodIndex