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pandas.Index.unique

Index.unique()[source]

Return unique values in the object. Uniques are returned in order of appearance, this does NOT sort. Hash table-based unique.

Parameters:

values : 1d array-like

Returns:

unique values.

  • If the input is an Index, the return is an Index
  • If the input is a Categorical dtype, the return is a Categorical
  • If the input is a Series/ndarray, the return will be an ndarray
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