40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
|
import numpy as np
|
||
|
|
import pytest
|
||
|
|
|
||
|
|
from pandas._libs.internals import BlockPlacement
|
||
|
|
import pandas.util._test_decorators as td
|
||
|
|
|
||
|
|
import pandas as pd
|
||
|
|
from pandas.core.internals import BlockManager
|
||
|
|
from pandas.core.internals.blocks import ExtensionBlock
|
||
|
|
|
||
|
|
pytestmark = td.skip_array_manager_invalid_test
|
||
|
|
|
||
|
|
|
||
|
|
class CustomBlock(ExtensionBlock):
|
||
|
|
_holder = np.ndarray
|
||
|
|
|
||
|
|
# Cannot override final attribute "_can_hold_na"
|
||
|
|
@property # type: ignore[misc]
|
||
|
|
def _can_hold_na(self) -> bool:
|
||
|
|
return False
|
||
|
|
|
||
|
|
|
||
|
|
@pytest.fixture
|
||
|
|
def df():
|
||
|
|
df1 = pd.DataFrame({"a": [1, 2, 3]})
|
||
|
|
blocks = df1._mgr.blocks
|
||
|
|
values = np.arange(3, dtype="int64")
|
||
|
|
bp = BlockPlacement(slice(1, 2))
|
||
|
|
custom_block = CustomBlock(values, placement=bp, ndim=2)
|
||
|
|
blocks = blocks + (custom_block,)
|
||
|
|
block_manager = BlockManager(blocks, [pd.Index(["a", "b"]), df1.index])
|
||
|
|
return pd.DataFrame(block_manager)
|
||
|
|
|
||
|
|
|
||
|
|
def test_concat_axis1(df):
|
||
|
|
# GH17954
|
||
|
|
df2 = pd.DataFrame({"c": [0.1, 0.2, 0.3]})
|
||
|
|
res = pd.concat([df, df2], axis=1)
|
||
|
|
assert isinstance(res._mgr.blocks[1], CustomBlock)
|