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import pytest
import pandas as pd
from pandas import Series
import pandas._testing as tm
def test_take_validate_axis():
# GH#51022
ser = Series([-1, 5, 6, 2, 4])
msg = "No axis named foo for object type Series"
with pytest.raises(ValueError, match=msg):
ser.take([1, 2], axis="foo")
def test_take():
ser = Series([-1, 5, 6, 2, 4])
actual = ser.take([1, 3, 4])
expected = Series([5, 2, 4], index=[1, 3, 4])
tm.assert_series_equal(actual, expected)
actual = ser.take([-1, 3, 4])
expected = Series([4, 2, 4], index=[4, 3, 4])
tm.assert_series_equal(actual, expected)
msg = "indices are out-of-bounds"
with pytest.raises(IndexError, match=msg):
ser.take([1, 10])
with pytest.raises(IndexError, match=msg):
ser.take([2, 5])
def test_take_categorical():
# https://github.com/pandas-dev/pandas/issues/20664
ser = Series(pd.Categorical(["a", "b", "c"]))
result = ser.take([-2, -2, 0])
expected = Series(
pd.Categorical(["b", "b", "a"], categories=["a", "b", "c"]), index=[1, 1, 0]
)
tm.assert_series_equal(result, expected)
def test_take_slice_raises():
ser = Series([-1, 5, 6, 2, 4])
msg = "Series.take requires a sequence of integers, not slice"
with pytest.raises(TypeError, match=msg):
ser.take(slice(0, 3, 1))