ai-content-maker/.venv/Lib/site-packages/pandas/tests/libs/test_join.py

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2024-05-03 04:18:51 +03:00
import numpy as np
import pytest
from pandas._libs import join as libjoin
from pandas._libs.join import (
inner_join,
left_outer_join,
)
import pandas._testing as tm
class TestIndexer:
@pytest.mark.parametrize(
"dtype", ["int32", "int64", "float32", "float64", "object"]
)
def test_outer_join_indexer(self, dtype):
indexer = libjoin.outer_join_indexer
left = np.arange(3, dtype=dtype)
right = np.arange(2, 5, dtype=dtype)
empty = np.array([], dtype=dtype)
result, lindexer, rindexer = indexer(left, right)
assert isinstance(result, np.ndarray)
assert isinstance(lindexer, np.ndarray)
assert isinstance(rindexer, np.ndarray)
tm.assert_numpy_array_equal(result, np.arange(5, dtype=dtype))
exp = np.array([0, 1, 2, -1, -1], dtype=np.intp)
tm.assert_numpy_array_equal(lindexer, exp)
exp = np.array([-1, -1, 0, 1, 2], dtype=np.intp)
tm.assert_numpy_array_equal(rindexer, exp)
result, lindexer, rindexer = indexer(empty, right)
tm.assert_numpy_array_equal(result, right)
exp = np.array([-1, -1, -1], dtype=np.intp)
tm.assert_numpy_array_equal(lindexer, exp)
exp = np.array([0, 1, 2], dtype=np.intp)
tm.assert_numpy_array_equal(rindexer, exp)
result, lindexer, rindexer = indexer(left, empty)
tm.assert_numpy_array_equal(result, left)
exp = np.array([0, 1, 2], dtype=np.intp)
tm.assert_numpy_array_equal(lindexer, exp)
exp = np.array([-1, -1, -1], dtype=np.intp)
tm.assert_numpy_array_equal(rindexer, exp)
def test_cython_left_outer_join(self):
left = np.array([0, 1, 2, 1, 2, 0, 0, 1, 2, 3, 3], dtype=np.intp)
right = np.array([1, 1, 0, 4, 2, 2, 1], dtype=np.intp)
max_group = 5
ls, rs = left_outer_join(left, right, max_group)
exp_ls = left.argsort(kind="mergesort")
exp_rs = right.argsort(kind="mergesort")
exp_li = np.array([0, 1, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 7, 7, 8, 8, 9, 10])
exp_ri = np.array(
[0, 0, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 5, 4, 5, 4, 5, -1, -1]
)
exp_ls = exp_ls.take(exp_li)
exp_ls[exp_li == -1] = -1
exp_rs = exp_rs.take(exp_ri)
exp_rs[exp_ri == -1] = -1
tm.assert_numpy_array_equal(ls, exp_ls, check_dtype=False)
tm.assert_numpy_array_equal(rs, exp_rs, check_dtype=False)
def test_cython_right_outer_join(self):
left = np.array([0, 1, 2, 1, 2, 0, 0, 1, 2, 3, 3], dtype=np.intp)
right = np.array([1, 1, 0, 4, 2, 2, 1], dtype=np.intp)
max_group = 5
rs, ls = left_outer_join(right, left, max_group)
exp_ls = left.argsort(kind="mergesort")
exp_rs = right.argsort(kind="mergesort")
# 0 1 1 1
exp_li = np.array(
[
0,
1,
2,
3,
4,
5,
3,
4,
5,
3,
4,
5,
# 2 2 4
6,
7,
8,
6,
7,
8,
-1,
]
)
exp_ri = np.array([0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6])
exp_ls = exp_ls.take(exp_li)
exp_ls[exp_li == -1] = -1
exp_rs = exp_rs.take(exp_ri)
exp_rs[exp_ri == -1] = -1
tm.assert_numpy_array_equal(ls, exp_ls)
tm.assert_numpy_array_equal(rs, exp_rs)
def test_cython_inner_join(self):
left = np.array([0, 1, 2, 1, 2, 0, 0, 1, 2, 3, 3], dtype=np.intp)
right = np.array([1, 1, 0, 4, 2, 2, 1, 4], dtype=np.intp)
max_group = 5
ls, rs = inner_join(left, right, max_group)
exp_ls = left.argsort(kind="mergesort")
exp_rs = right.argsort(kind="mergesort")
exp_li = np.array([0, 1, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 7, 7, 8, 8])
exp_ri = np.array([0, 0, 0, 1, 2, 3, 1, 2, 3, 1, 2, 3, 4, 5, 4, 5, 4, 5])
exp_ls = exp_ls.take(exp_li)
exp_ls[exp_li == -1] = -1
exp_rs = exp_rs.take(exp_ri)
exp_rs[exp_ri == -1] = -1
tm.assert_numpy_array_equal(ls, exp_ls)
tm.assert_numpy_array_equal(rs, exp_rs)
@pytest.mark.parametrize("readonly", [True, False])
def test_left_join_indexer_unique(readonly):
a = np.array([1, 2, 3, 4, 5], dtype=np.int64)
b = np.array([2, 2, 3, 4, 4], dtype=np.int64)
if readonly:
# GH#37312, GH#37264
a.setflags(write=False)
b.setflags(write=False)
result = libjoin.left_join_indexer_unique(b, a)
expected = np.array([1, 1, 2, 3, 3], dtype=np.intp)
tm.assert_numpy_array_equal(result, expected)
def test_left_outer_join_bug():
left = np.array(
[
0,
1,
0,
1,
1,
2,
3,
1,
0,
2,
1,
2,
0,
1,
1,
2,
3,
2,
3,
2,
1,
1,
3,
0,
3,
2,
3,
0,
0,
2,
3,
2,
0,
3,
1,
3,
0,
1,
3,
0,
0,
1,
0,
3,
1,
0,
1,
0,
1,
1,
0,
2,
2,
2,
2,
2,
0,
3,
1,
2,
0,
0,
3,
1,
3,
2,
2,
0,
1,
3,
0,
2,
3,
2,
3,
3,
2,
3,
3,
1,
3,
2,
0,
0,
3,
1,
1,
1,
0,
2,
3,
3,
1,
2,
0,
3,
1,
2,
0,
2,
],
dtype=np.intp,
)
right = np.array([3, 1], dtype=np.intp)
max_groups = 4
lidx, ridx = libjoin.left_outer_join(left, right, max_groups, sort=False)
exp_lidx = np.arange(len(left), dtype=np.intp)
exp_ridx = -np.ones(len(left), dtype=np.intp)
exp_ridx[left == 1] = 1
exp_ridx[left == 3] = 0
tm.assert_numpy_array_equal(lidx, exp_lidx)
tm.assert_numpy_array_equal(ridx, exp_ridx)
def test_inner_join_indexer():
a = np.array([1, 2, 3, 4, 5], dtype=np.int64)
b = np.array([0, 3, 5, 7, 9], dtype=np.int64)
index, ares, bres = libjoin.inner_join_indexer(a, b)
index_exp = np.array([3, 5], dtype=np.int64)
tm.assert_almost_equal(index, index_exp)
aexp = np.array([2, 4], dtype=np.intp)
bexp = np.array([1, 2], dtype=np.intp)
tm.assert_almost_equal(ares, aexp)
tm.assert_almost_equal(bres, bexp)
a = np.array([5], dtype=np.int64)
b = np.array([5], dtype=np.int64)
index, ares, bres = libjoin.inner_join_indexer(a, b)
tm.assert_numpy_array_equal(index, np.array([5], dtype=np.int64))
tm.assert_numpy_array_equal(ares, np.array([0], dtype=np.intp))
tm.assert_numpy_array_equal(bres, np.array([0], dtype=np.intp))
def test_outer_join_indexer():
a = np.array([1, 2, 3, 4, 5], dtype=np.int64)
b = np.array([0, 3, 5, 7, 9], dtype=np.int64)
index, ares, bres = libjoin.outer_join_indexer(a, b)
index_exp = np.array([0, 1, 2, 3, 4, 5, 7, 9], dtype=np.int64)
tm.assert_almost_equal(index, index_exp)
aexp = np.array([-1, 0, 1, 2, 3, 4, -1, -1], dtype=np.intp)
bexp = np.array([0, -1, -1, 1, -1, 2, 3, 4], dtype=np.intp)
tm.assert_almost_equal(ares, aexp)
tm.assert_almost_equal(bres, bexp)
a = np.array([5], dtype=np.int64)
b = np.array([5], dtype=np.int64)
index, ares, bres = libjoin.outer_join_indexer(a, b)
tm.assert_numpy_array_equal(index, np.array([5], dtype=np.int64))
tm.assert_numpy_array_equal(ares, np.array([0], dtype=np.intp))
tm.assert_numpy_array_equal(bres, np.array([0], dtype=np.intp))
def test_left_join_indexer():
a = np.array([1, 2, 3, 4, 5], dtype=np.int64)
b = np.array([0, 3, 5, 7, 9], dtype=np.int64)
index, ares, bres = libjoin.left_join_indexer(a, b)
tm.assert_almost_equal(index, a)
aexp = np.array([0, 1, 2, 3, 4], dtype=np.intp)
bexp = np.array([-1, -1, 1, -1, 2], dtype=np.intp)
tm.assert_almost_equal(ares, aexp)
tm.assert_almost_equal(bres, bexp)
a = np.array([5], dtype=np.int64)
b = np.array([5], dtype=np.int64)
index, ares, bres = libjoin.left_join_indexer(a, b)
tm.assert_numpy_array_equal(index, np.array([5], dtype=np.int64))
tm.assert_numpy_array_equal(ares, np.array([0], dtype=np.intp))
tm.assert_numpy_array_equal(bres, np.array([0], dtype=np.intp))
def test_left_join_indexer2():
idx = np.array([1, 1, 2, 5], dtype=np.int64)
idx2 = np.array([1, 2, 5, 7, 9], dtype=np.int64)
res, lidx, ridx = libjoin.left_join_indexer(idx2, idx)
exp_res = np.array([1, 1, 2, 5, 7, 9], dtype=np.int64)
tm.assert_almost_equal(res, exp_res)
exp_lidx = np.array([0, 0, 1, 2, 3, 4], dtype=np.intp)
tm.assert_almost_equal(lidx, exp_lidx)
exp_ridx = np.array([0, 1, 2, 3, -1, -1], dtype=np.intp)
tm.assert_almost_equal(ridx, exp_ridx)
def test_outer_join_indexer2():
idx = np.array([1, 1, 2, 5], dtype=np.int64)
idx2 = np.array([1, 2, 5, 7, 9], dtype=np.int64)
res, lidx, ridx = libjoin.outer_join_indexer(idx2, idx)
exp_res = np.array([1, 1, 2, 5, 7, 9], dtype=np.int64)
tm.assert_almost_equal(res, exp_res)
exp_lidx = np.array([0, 0, 1, 2, 3, 4], dtype=np.intp)
tm.assert_almost_equal(lidx, exp_lidx)
exp_ridx = np.array([0, 1, 2, 3, -1, -1], dtype=np.intp)
tm.assert_almost_equal(ridx, exp_ridx)
def test_inner_join_indexer2():
idx = np.array([1, 1, 2, 5], dtype=np.int64)
idx2 = np.array([1, 2, 5, 7, 9], dtype=np.int64)
res, lidx, ridx = libjoin.inner_join_indexer(idx2, idx)
exp_res = np.array([1, 1, 2, 5], dtype=np.int64)
tm.assert_almost_equal(res, exp_res)
exp_lidx = np.array([0, 0, 1, 2], dtype=np.intp)
tm.assert_almost_equal(lidx, exp_lidx)
exp_ridx = np.array([0, 1, 2, 3], dtype=np.intp)
tm.assert_almost_equal(ridx, exp_ridx)