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# pandas.Series.iloc

property Series.iloc

  Purely integer-location based indexing for selection by position.

  Changed in version 3.0: Callables which return a tuple are deprecated as input.

  `.iloc[]` is primarily integer position based (from `0` to `length-1` of the axis), but may also be used with a boolean array.

  Allowed inputs are:

  - An integer, e.g. `5`.

  - A list or array of integers, e.g. `[4, 3, 0]`.

  - A slice object with ints, e.g. `1:7`.

  - A boolean array.

  - A `callable` function with one argument (the calling Series or DataFrame) and that returns valid output for indexing (one of the above). This is useful in method chains, when you don’t have a reference to the calling object, but would like to base your selection on some value.

  - A tuple of row and column indexes. The tuple elements consist of one of the above inputs, e.g. `(0, 1)`.

  `.iloc` will raise `IndexError` if a requested indexer is out-of-bounds, except slice indexers which allow out-of-bounds indexing (this conforms with python/numpy slice semantics).

  See more at Selection by Position.

  See also

  `DataFrame.iat`

    Fast integer location scalar accessor.

  `DataFrame.loc`

    Purely label-location based indexer for selection by label.

  `Series.iloc`

    Purely integer-location based indexing for selection by position.

  Examples

      >>> mydict = [
      ...     {"a": 1, "b": 2, "c": 3, "d": 4},
      ...     {"a": 100, "b": 200, "c": 300, "d": 400},
      ...     {"a": 1000, "b": 2000, "c": 3000, "d": 4000},
      ... ]
      >>> df = pd.DataFrame(mydict)
      >>> df
            a     b     c     d
      0     1     2     3     4
      1   100   200   300   400
      2  1000  2000  3000  4000

  Indexing just the rows

  With a scalar integer.

      >>> type(df.iloc[0])
      <class 'pandas.Series'>
      >>> df.iloc[0]
      a    1
      b    2
      c    3
      d    4
      Name: 0, dtype: int64

  With a list of integers.

      >>> df.iloc[[0]]
         a  b  c  d
      0  1  2  3  4
      >>> type(df.iloc[[0]])
      <class 'pandas.DataFrame'>

      >>> df.iloc[[0, 1]]
           a    b    c    d
      0    1    2    3    4
      1  100  200  300  400

  With a slice object.

      >>> df.iloc[:3]
            a     b     c     d
      0     1     2     3     4
      1   100   200   300   400
      2  1000  2000  3000  4000

  With a boolean mask the same length as the index.

      >>> df.iloc[[True, False, True]]
            a     b     c     d
      0     1     2     3     4
      2  1000  2000  3000  4000

  With a callable, useful in method chains. The x passed to the `lambda` is the DataFrame being sliced. This selects the rows whose index label even.

      >>> df.iloc[lambda x: x.index % 2 == 0]
            a     b     c     d
      0     1     2     3     4
      2  1000  2000  3000  4000

  Indexing both axes

  You can mix the indexer types for the index and columns. Use `:` to select the entire axis.

  With scalar integers.

      >>> df.iloc[0, 1]
      np.int64(2)

  With lists of integers.

      >>> df.iloc[[0, 2], [1, 3]]
            b     d
      0     2     4
      2  2000  4000

  With slice objects.

      >>> df.iloc[1:3, 0:3]
            a     b     c
      1   100   200   300
      2  1000  2000  3000

  With a boolean array whose length matches the columns.

      >>> df.iloc[:, [True, False, True, False]]
            a     c
      0     1     3
      1   100   300
      2  1000  3000

  With a callable function that expects the Series or DataFrame.

      >>> df.iloc[:, lambda df: [0, 2]]
            a     c
      0     1     3
      1   100   300
      2  1000  3000