from copy import (
|
copy,
|
deepcopy,
|
)
|
|
import pytest
|
|
from pandas import MultiIndex
|
import pandas._testing as tm
|
|
|
def assert_multiindex_copied(copy, original):
|
# Levels should be (at least, shallow copied)
|
tm.assert_copy(copy.levels, original.levels)
|
tm.assert_almost_equal(copy.codes, original.codes)
|
|
# Labels doesn't matter which way copied
|
tm.assert_almost_equal(copy.codes, original.codes)
|
assert copy.codes is not original.codes
|
|
# Names doesn't matter which way copied
|
assert copy.names == original.names
|
assert copy.names is not original.names
|
|
# Sort order should be copied
|
assert copy.sortorder == original.sortorder
|
|
|
def test_copy(idx):
|
i_copy = idx.copy()
|
|
assert_multiindex_copied(i_copy, idx)
|
|
|
def test_shallow_copy(idx):
|
i_copy = idx._view()
|
|
assert_multiindex_copied(i_copy, idx)
|
|
|
def test_view(idx):
|
i_view = idx.view()
|
assert_multiindex_copied(i_view, idx)
|
|
|
@pytest.mark.parametrize("func", [copy, deepcopy])
|
def test_copy_and_deepcopy(func):
|
idx = MultiIndex(
|
levels=[["foo", "bar"], ["fizz", "buzz"]],
|
codes=[[0, 0, 0, 1], [0, 0, 1, 1]],
|
names=["first", "second"],
|
)
|
idx_copy = func(idx)
|
assert idx_copy is not idx
|
assert idx_copy.equals(idx)
|
|
|
@pytest.mark.parametrize("deep", [True, False])
|
def test_copy_method(deep):
|
idx = MultiIndex(
|
levels=[["foo", "bar"], ["fizz", "buzz"]],
|
codes=[[0, 0, 0, 1], [0, 0, 1, 1]],
|
names=["first", "second"],
|
)
|
idx_copy = idx.copy(deep=deep)
|
assert idx_copy.equals(idx)
|
|
|
@pytest.mark.parametrize("deep", [True, False])
|
@pytest.mark.parametrize(
|
"kwarg, value",
|
[
|
("names", ["third", "fourth"]),
|
],
|
)
|
def test_copy_method_kwargs(deep, kwarg, value):
|
# gh-12309: Check that the "name" argument as well other kwargs are honored
|
idx = MultiIndex(
|
levels=[["foo", "bar"], ["fizz", "buzz"]],
|
codes=[[0, 0, 0, 1], [0, 0, 1, 1]],
|
names=["first", "second"],
|
)
|
idx_copy = idx.copy(**{kwarg: value, "deep": deep})
|
assert getattr(idx_copy, kwarg) == value
|
|
|
def test_copy_deep_false_retains_id():
|
# GH#47878
|
idx = MultiIndex(
|
levels=[["foo", "bar"], ["fizz", "buzz"]],
|
codes=[[0, 0, 0, 1], [0, 0, 1, 1]],
|
names=["first", "second"],
|
)
|
|
res = idx.copy(deep=False)
|
assert res._id is idx._id
|
