Joris Van den Bossche created ARROW-7857: --------------------------------------------
Summary: [Python] Failing test with pandas master for extension type conversion Key: ARROW-7857 URL: https://issues.apache.org/jira/browse/ARROW-7857 Project: Apache Arrow Issue Type: Test Components: Python Reporter: Joris Van den Bossche Assignee: Joris Van den Bossche The pandas master test build has one failure {code} _______________ test_conversion_extensiontype_to_extensionarray ________________ monkeypatch = <_pytest.monkeypatch.MonkeyPatch object at 0x7fcd6c580bd0> def test_conversion_extensiontype_to_extensionarray(monkeypatch): # converting extension type to linked pandas ExtensionDtype/Array import pandas.core.internals as _int storage = pa.array([1, 2, 3, 4], pa.int64()) arr = pa.ExtensionArray.from_storage(MyCustomIntegerType(), storage) table = pa.table({'a': arr}) if LooseVersion(pd.__version__) < "0.26.0.dev": # ensure pandas Int64Dtype has the protocol method (for older pandas) monkeypatch.setattr( pd.Int64Dtype, '__from_arrow__', _Int64Dtype__from_arrow__, raising=False) # extension type points to Int64Dtype, which knows how to create a # pandas ExtensionArray > result = table.to_pandas() opt/conda/envs/arrow/lib/python3.7/site-packages/pyarrow/tests/test_pandas.py:3560: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ pyarrow/ipc.pxi:559: in pyarrow.lib.read_message ??? pyarrow/table.pxi:1369: in pyarrow.lib.Table._to_pandas ??? opt/conda/envs/arrow/lib/python3.7/site-packages/pyarrow/pandas_compat.py:764: in table_to_blockmanager blocks = _table_to_blocks(options, table, categories, ext_columns_dtypes) opt/conda/envs/arrow/lib/python3.7/site-packages/pyarrow/pandas_compat.py:1102: in _table_to_blocks for item in result] opt/conda/envs/arrow/lib/python3.7/site-packages/pyarrow/pandas_compat.py:1102: in <listcomp> for item in result] opt/conda/envs/arrow/lib/python3.7/site-packages/pyarrow/pandas_compat.py:723: in _reconstruct_block pd_ext_arr = pandas_dtype.__from_arrow__(arr) opt/conda/envs/arrow/lib/python3.7/site-packages/pandas/core/arrays/integer.py:108: in __from_arrow__ array = array.cast(pyarrow_type) pyarrow/table.pxi:240: in pyarrow.lib.ChunkedArray.cast ??? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ > ??? E pyarrow.lib.ArrowNotImplementedError: No cast implemented from extension<arrow.py_extension_type> to int64 {code} -- This message was sent by Atlassian Jira (v8.3.4#803005)