&res created ARROW-18257:
----------------------------
Summary: [Python] array of time64 type changes from Time64Type to
DataType
Key: ARROW-18257
URL: https://issues.apache.org/jira/browse/ARROW-18257
Project: Apache Arrow
Issue Type: Bug
Environment: python 3.9
pyarrow 10.0.0
No pandas installed
Reporter: &res
When creating an array of time64 elements, the array type information is
changed from Time64Type to DataType.
While it's not an issue as such, given it still looks like an array of time64,
I can't access special attributes of the Time64Type (for example unit)
{code:java}
dtype = pa.time64("ns")
time_array = pa.array(
[
1,
2,
3
],
dtype
)
assert pa.types.is_time64(time_array.type) is True
assert isinstance(dtype, pa.Time64Type) is True
assert isinstance(time_array.type, pa.Time64Type) is False # Wrong
assert isinstance(time_array.type, pa.DataType) is True # Wrong
assert dtype == time_array.type
assert dtype.unit == "ns"
with pytest.raises(AttributeError, match=r"'pyarrow.lib.DataType' object has no
attribute 'unit'"):
# Should be able to access unit:
time_array.type.unit{code}
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