series_setitem_slice.py

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import numpy as np
import pandas as pd

from numba import njit


@njit
def series_setitem():
    value = 0
    series = pd.Series(np.arange(5, 0, -1))  # Series of 5, 4, 3, 2, 1

    series[2:5] = value

    return series   # result Series of 5, 4, 0, 0, 0


print(series_setitem())