def test_to_python():
a = Series("a", range(20))
b = a.to_list()
assert isinstance(b, list)
assert len(b) == 20
a = Series("a", [1, None, 2], nullable=True)
assert a.null_count() == 1
assert a.to_list() == [1, None, 2]
def test_series_slice(
srs: pl.Series,
start: int | None,
stop: int | None,
step: int | None,
) -> None:
py_data = srs.to_list()
s = slice(start, stop, step)
sliced_py_data = py_data[s]
sliced_pl_data = srs[s].to_list()
assert sliced_py_data == sliced_pl_data, f"slice [{start}:{stop}:{step}] failed"
assert_series_equal(srs, srs, check_exact=True)
def test_object():
vals = [[12], "foo", 9]
a = Series("a", vals)
assert a.dtype == Object
assert a.to_list() == vals
assert a[1] == "foo"