def test_join_non_int_index(self):
index = Int64Index(range(0, 20, 2))
other = Index([3, 6, 7, 8, 10], dtype=object)
outer = index.join(other, how="outer")
outer2 = other.join(index, how="outer")
expected = Index([0, 2, 3, 4, 6, 7, 8, 10, 12, 14, 16, 18])
tm.assert_index_equal(outer, outer2)
tm.assert_index_equal(outer, expected)
inner = index.join(other, how="inner")
inner2 = other.join(index, how="inner")
expected = Index([6, 8, 10])
tm.assert_index_equal(inner, inner2)
tm.assert_index_equal(inner, expected)
left = index.join(other, how="left")
tm.assert_index_equal(left, index.astype(object))
left2 = other.join(index, how="left")
tm.assert_index_equal(left2, other)
right = index.join(other, how="right")
tm.assert_index_equal(right, other)
right2 = other.join(index, how="right")
tm.assert_index_equal(right2, index.astype(object))
def test_join_non_int_index(self, index_large):
other = Index(2**63 + np.array([1, 5, 7, 10, 20], dtype="uint64"),
dtype=object)
outer = index_large.join(other, how="outer")
outer2 = other.join(index_large, how="outer")
expected = Index(
2**63 + np.array([0, 1, 5, 7, 10, 15, 20, 25], dtype="uint64"))
tm.assert_index_equal(outer, outer2)
tm.assert_index_equal(outer, expected)
inner = index_large.join(other, how="inner")
inner2 = other.join(index_large, how="inner")
expected = Index(2**63 + np.array([10, 20], dtype="uint64"))
tm.assert_index_equal(inner, inner2)
tm.assert_index_equal(inner, expected)
left = index_large.join(other, how="left")
tm.assert_index_equal(left, index_large.astype(object))
left2 = other.join(index_large, how="left")
tm.assert_index_equal(left2, other)
right = index_large.join(other, how="right")
tm.assert_index_equal(right, other)
right2 = other.join(index_large, how="right")
tm.assert_index_equal(right2, index_large.astype(object))
def test_join_left(self):
index = Int64Index(range(0, 20, 2))
other = Int64Index([7, 12, 25, 1, 2, 5])
other_mono = Int64Index([1, 2, 5, 7, 12, 25])
# not monotonic
res, lidx, ridx = index.join(other, how="left", return_indexers=True)
eres = index
eridx = np.array([-1, 4, -1, -1, -1, -1, 1, -1, -1, -1], dtype=np.intp)
assert isinstance(res, Int64Index)
tm.assert_index_equal(res, eres)
assert lidx is None
tm.assert_numpy_array_equal(ridx, eridx)
# monotonic
res, lidx, ridx = index.join(other_mono,
how="left",
return_indexers=True)
eridx = np.array([-1, 1, -1, -1, -1, -1, 4, -1, -1, -1], dtype=np.intp)
assert isinstance(res, Int64Index)
tm.assert_index_equal(res, eres)
assert lidx is None
tm.assert_numpy_array_equal(ridx, eridx)
# non-unique
idx = Index([1, 1, 2, 5])
idx2 = Index([1, 2, 5, 7, 9])
res, lidx, ridx = idx2.join(idx, how="left", return_indexers=True)
eres = Index([1, 1, 2, 5, 7, 9]) # 1 is in idx2, so it should be x2
eridx = np.array([0, 1, 2, 3, -1, -1], dtype=np.intp)
elidx = np.array([0, 0, 1, 2, 3, 4], dtype=np.intp)
tm.assert_index_equal(res, eres)
tm.assert_numpy_array_equal(lidx, elidx)
tm.assert_numpy_array_equal(ridx, eridx)
def test_join_non_unique(self):
left = Index([4, 4, 3, 3])
joined, lidx, ridx = left.join(left, return_indexers=True)
exp_joined = Index([3, 3, 3, 3, 4, 4, 4, 4])
tm.assert_index_equal(joined, exp_joined)
exp_lidx = np.array([2, 2, 3, 3, 0, 0, 1, 1], dtype=np.intp)
tm.assert_numpy_array_equal(lidx, exp_lidx)
exp_ridx = np.array([2, 3, 2, 3, 0, 1, 0, 1], dtype=np.intp)
tm.assert_numpy_array_equal(ridx, exp_ridx)