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  * pandas.Index... 

#  pandas.Index.duplicated  #

Index.  duplicated  (  _ keep  =  'first'  _ )  [ [source]
](https://github.com/pandas-
dev/pandas/blob/v2.2.2/pandas/core/indexes/base.py#L3122-L3179) #

    

Indicate duplicate index values.

Duplicated values are indicated as ` True  ` values in the resulting array.
Either all duplicates, all except the first, or all except the last occurrence
of duplicates can be indicated.

Parameters  :

    

**keep** {âfirstâ, âlastâ, False}, default âfirstâ

    

The value or values in a set of duplicates to mark as missing.

  * âfirstâ : Mark duplicates as ` True  ` except for the first occurrence. 

  * âlastâ : Mark duplicates as ` True  ` except for the last occurrence. 

  * ` False  ` : Mark all duplicates as ` True  ` . 

Returns  :

    

np.ndarray[bool]

    

See also

[ ` Series.duplicated  `
](pandas.Series.duplicated.html#pandas.Series.duplicated
"pandas.Series.duplicated")

    

Equivalent method on pandas.Series.

[ ` DataFrame.duplicated  `
](pandas.DataFrame.duplicated.html#pandas.DataFrame.duplicated
"pandas.DataFrame.duplicated")

    

Equivalent metho