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pandas.Index.duplicated

Index.duplicated(keep='first')[source]

Return boolean np.ndarray denoting duplicate values

Parameters:

keep : {‘first’, ‘last’, False}, default ‘first’

  • first : Mark duplicates as True except for the first occurrence.
  • last : Mark duplicates as True except for the last occurrence.
  • False : Mark all duplicates as True.
Returns:

duplicated : np.ndarray

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