Pandas: Data Manipulation - unique() function

unique() function

Hash table-based unique. Uniques are returned in order of appearance. This does NOT sort.
Significantly faster than numpy.unique. Includes NA values.

Syntax:

pandas.unique(values)

Parameters:

Returns: numpy.ndarray or ExtensionArray

The return can be:
• Index : when the input is an Index
• Categorical : when the input is a Categorical dtype
• ndarray : when the input is a Series/ndarray

Return numpy.ndarray or ExtensionArray.

Example:

Download the Pandas DataFrame Notebooks from here.

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