Antoine Pitrou created ARROW-2033:
-------------------------------------
Summary: pa.array() doesn't work with iterators
Key: ARROW-2033
URL: https://issues.apache.org/jira/browse/ARROW-2033
Project: Apache Arrow
Issue Type: Bug
Components: Python
Affects Versions: 0.9.0
Reporter: Antoine Pitrou
pa.array handles iterables fine, but not iterators if size isn't passed:
{code:java}
>>> arr = pa.array(range(5))
>>> arr
<pyarrow.lib.Int64Array object at 0x7f4652a05318>
[
0,
1,
2,
3,
4
]
>>> arr = pa.array(iter(range(5)))
>>> arr
<pyarrow.lib.NullArray object at 0x7f4633c1d638>
[
NA,
NA,
NA,
NA,
NA
]
{code}
This is because InferArrowSize() first exhausts the iterator.
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