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    * pandas.unique 
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    * [ pandas.wide_to_long ](pandas.wide_to_long.html)
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  * pandas.unique 

#  pandas.unique  #

pandas.  unique  (  _ values  _ )  [ [source]  ](https://github.com/pandas-
dev/pandas/blob/v2.2.2/pandas/core/algorithms.py#L307-L401) #

    

Return unique values based on a hash table.

Uniques are returned in order of appearance. This does NOT sort.

Significantly faster than numpy.unique for long enough sequences. Includes NA
values.

Parameters  :