def test_get_indexer_limit(self):
# GH 28631
idx = RangeIndex(4)
target = RangeIndex(6)
result = idx.get_indexer(target, method="pad", limit=1)
expected = np.array([0, 1, 2, 3, 3, -1], dtype=np.intp)
tm.assert_numpy_array_equal(result, expected)
def test_engineless_lookup(self):
# GH 16685
# Standard lookup on RangeIndex should not require the engine to be
# created
idx = RangeIndex(2, 10, 3)
assert idx.get_loc(5) == 1
tm.assert_numpy_array_equal(idx.get_indexer([2, 8]),
ensure_platform_int(np.array([0, 2])))
with pytest.raises(KeyError):
idx.get_loc(3)
assert '_engine' not in idx._cache
# The engine is still required for lookup of a different dtype scalar:
with pytest.raises(KeyError):
assert idx.get_loc('a') == -1
assert '_engine' in idx._cache
def test_engineless_lookup(self):
# GH 16685
# Standard lookup on RangeIndex should not require the engine to be
# created
idx = RangeIndex(2, 10, 3)
assert idx.get_loc(5) == 1
tm.assert_numpy_array_equal(idx.get_indexer([2, 8]),
ensure_platform_int(np.array([0, 2])))
with pytest.raises(KeyError, match="3"):
idx.get_loc(3)
assert "_engine" not in idx._cache
# Different types of scalars can be excluded immediately, no need to
# use the _engine
with pytest.raises(KeyError, match="'a'"):
idx.get_loc("a")
assert "_engine" not in idx._cache
def test_get_indexer_decreasing(self, stop):
# GH 28678
index = RangeIndex(7, stop, -3)
result = index.get_indexer(range(9))
expected = np.array([-1, 2, -1, -1, 1, -1, -1, 0, -1], dtype=np.intp)
tm.assert_numpy_array_equal(result, expected)
def test_get_indexer(self):
index = RangeIndex(start=0, stop=20, step=2)
target = RangeIndex(10)
indexer = index.get_indexer(target)
expected = np.array([0, -1, 1, -1, 2, -1, 3, -1, 4, -1], dtype=np.intp)
tm.assert_numpy_array_equal(indexer, expected)
def test_get_indexer_backfill(self):
index = RangeIndex(start=0, stop=20, step=2)
target = RangeIndex(10)
indexer = index.get_indexer(target, method="backfill")
expected = np.array([0, 1, 1, 2, 2, 3, 3, 4, 4, 5], dtype=np.intp)
tm.assert_numpy_array_equal(indexer, expected)