pd.DataFrame.first

pandas.DataFrame.first(offset)

Supported Arguments

• offset: String or Offset type
  • String argument must be a valid frequency alias.

Note

DataFrame must have a valid DatetimeIndex and is assumed to already be sorted. This function have undefined behavior if the DatetimeIndex is not sorted.

Example Usage

>>> @bodo.jit
... def f(df, offset):
...     return df.first(offset)
>>> df = pd.DataFrame({"A": np.arange(100), "B": np.arange(100, 200)}, index=pd.date_range(start='1/1/2022', end='12/31/2024', periods=100))
>>> f(df, "2M")
                             A    B
2022-01-01 00:00:00.000000000  0  100
2022-01-12 01:27:16.363636363  1  101
2022-01-23 02:54:32.727272727  2  102
2022-02-03 04:21:49.090909091  3  103
2022-02-14 05:49:05.454545454  4  104
2022-02-25 07:16:21.818181818  5  105