er_categories ](pandas.Series.cat.reorder_categories.html)
    * [ pandas.Series.cat.add_categories ](pandas.Series.cat.add_categories.html)
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  * [ __ ](../../index.html)
  * [ API reference ](../index.html)
  * [ Series ](../series.html)
  * pandas.Serie... 

#  pandas.Series.nunique  #

Series.  nunique  (  _ dropna  =  True  _ )  [ [source]
](https://github.com/pandas-
dev/pandas/blob/v2.2.2/pandas/core/base.py#L1028-L1066) #

    

Return number of unique elements in the object.

Excludes NA values by default.

Parameters  :

    

**dropna** bool, default True

    

Donât inclu