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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2022/04/05 10:39:41 UTC
[GitHub] [arrow] raulcd opened a new pull request, #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
raulcd opened a new pull request, #12797:
URL: https://github.com/apache/arrow/pull/12797
This PR fixes a bug when a list with a single element was used on `ParquestDataset.read()`.
The following snippet was reported to reproduce the bug:
**Before solution**
```python
In [1]: import pyarrow.parquet as pq
...: import pandas as pd
...: df = pd.DataFrame({'A': [1, 2, 3], 'B': ['a', 'b', 'c']})
...: df.to_parquet('/tmp/test.parquet', index=False)
...: pq.ParquetDataset(['/tmp/test.parquet'], use_legacy_dataset=False).read(use_threads=False).to_pandas()
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
ValueError: cannot construct a FileSource from a path without a FileSystem
Exception ignored in: 'pyarrow._dataset._make_file_source'
Traceback (most recent call last):
File "/home/raulcd/open_source/arrow/python/pyarrow/parquet.py", line 1815, in __init__
fragment = parquet_format.make_fragment(single_file, filesystem)
ValueError: cannot construct a FileSource from a path without a FileSystem
---------------------------------------------------------------------------
```
**After solution**
```python
In [1]: import pyarrow.parquet as pq
...: import pandas as pd
...: df = pd.DataFrame({'A': [1, 2, 3], 'B': ['a', 'b', 'c']})
...: df.to_parquet('/tmp/test.parquet', index=False)
...: pq.ParquetDataset(['/tmp/test.parquet'], use_legacy_dataset=False).read(use_threads=False).to_pandas()
Out[1]:
A B
0 1 a
1 2 b
2 3 c
```
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[GitHub] [arrow] raulcd commented on a diff in pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
Posted by GitBox <gi...@apache.org>.
raulcd commented on code in PR #12797:
URL: https://github.com/apache/arrow/pull/12797#discussion_r842732031
##########
python/pyarrow/tests/parquet/test_dataset.py:
##########
@@ -639,6 +639,21 @@ def test_read_directory_s3fs(s3_example_s3fs, use_legacy_dataset):
assert result.equals(table)
+@pytest.mark.pandas
+@parametrize_legacy_dataset
+def test_read_single_file_list(tempdir, use_legacy_dataset):
+ base_path = str(tempdir)
+ data_path = os.path.join(base_path, 'data.parquet')
Review Comment:
Thanks! I did not know you could do that. I have added a commit with a change similar to the suggested `data_path = str(tempdir / 'data.parquet')`
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[GitHub] [arrow] raulcd commented on a diff in pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
Posted by GitBox <gi...@apache.org>.
raulcd commented on code in PR #12797:
URL: https://github.com/apache/arrow/pull/12797#discussion_r842732031
##########
python/pyarrow/tests/parquet/test_dataset.py:
##########
@@ -639,6 +639,21 @@ def test_read_directory_s3fs(s3_example_s3fs, use_legacy_dataset):
assert result.equals(table)
+@pytest.mark.pandas
+@parametrize_legacy_dataset
+def test_read_single_file_list(tempdir, use_legacy_dataset):
+ base_path = str(tempdir)
+ data_path = os.path.join(base_path, 'data.parquet')
Review Comment:
Thanks! I did not know you could do that. I have added a commit with a change similar to the suggested `data_path = str(base_path / 'data.parquet')`
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[GitHub] [arrow] ursabot commented on pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
Posted by GitBox <gi...@apache.org>.
ursabot commented on PR #12797:
URL: https://github.com/apache/arrow/pull/12797#issuecomment-1089766142
Benchmark runs are scheduled for baseline = e92c77564592fadc0d8e6a34964f79d26b9448d4 and contender = 0015561b35f413c4b6c7309f2f86a845860c6e7f. 0015561b35f413c4b6c7309f2f86a845860c6e7f is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Finished :arrow_down:0.0% :arrow_up:0.0%] [ec2-t3-xlarge-us-east-2](https://conbench.ursa.dev/compare/runs/cb9d5a5909e44a56885f2860585c6c6e...6d56d1118f244f498daa0a4d6d941756/)
[Finished :arrow_down:0.13% :arrow_up:0.0%] [test-mac-arm](https://conbench.ursa.dev/compare/runs/8d04553a6b044419b43bd829ca8e9b15...f2332874be9d4b46a647f3b6d0cb23f2/)
[Failed :arrow_down:0.36% :arrow_up:0.0%] [ursa-i9-9960x](https://conbench.ursa.dev/compare/runs/c4827b8bba2249e0b8e5a23c45f6721e...e7acb571893747c8b9d29f2c8734bb56/)
[Finished :arrow_down:0.09% :arrow_up:0.0%] [ursa-thinkcentre-m75q](https://conbench.ursa.dev/compare/runs/33df057429974cf6a11ea8ad4b4dc314...aa4aa1a1fcaf4911afda0f91ae1148e3/)
Buildkite builds:
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ec2-t3-xlarge-us-east-2/builds/447| `0015561b` ec2-t3-xlarge-us-east-2>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-test-mac-arm/builds/432| `0015561b` test-mac-arm>
[Failed] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ursa-i9-9960x/builds/433| `0015561b` ursa-i9-9960x>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ursa-thinkcentre-m75q/builds/442| `0015561b` ursa-thinkcentre-m75q>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ec2-t3-xlarge-us-east-2/builds/446| `e92c7756` ec2-t3-xlarge-us-east-2>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-test-mac-arm/builds/431| `e92c7756` test-mac-arm>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ursa-i9-9960x/builds/432| `e92c7756` ursa-i9-9960x>
[Finished] <https://buildkite.com/apache-arrow/arrow-bci-benchmark-on-ursa-thinkcentre-m75q/builds/441| `e92c7756` ursa-thinkcentre-m75q>
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java
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[GitHub] [arrow] jorisvandenbossche commented on a diff in pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
Posted by GitBox <gi...@apache.org>.
jorisvandenbossche commented on code in PR #12797:
URL: https://github.com/apache/arrow/pull/12797#discussion_r842682271
##########
python/pyarrow/tests/parquet/test_dataset.py:
##########
@@ -639,6 +639,21 @@ def test_read_directory_s3fs(s3_example_s3fs, use_legacy_dataset):
assert result.equals(table)
+@pytest.mark.pandas
+@parametrize_legacy_dataset
+def test_read_single_file_list(tempdir, use_legacy_dataset):
+ base_path = str(tempdir)
+ data_path = os.path.join(base_path, 'data.parquet')
Review Comment:
```suggestion
data_path = str(base_path / 'data.parquet')
```
The `tempdir` fixture is a pathlib object, so that allows to write it like the above
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[GitHub] [arrow] github-actions[bot] commented on pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on PR #12797:
URL: https://github.com/apache/arrow/pull/12797#issuecomment-1088543279
https://issues.apache.org/jira/browse/ARROW-13922
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[GitHub] [arrow] jorisvandenbossche closed pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
Posted by GitBox <gi...@apache.org>.
jorisvandenbossche closed pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
URL: https://github.com/apache/arrow/pull/12797
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[GitHub] [arrow] github-actions[bot] commented on pull request #12797: [ARROW-13922] Fix ParquetDataset throw error when len(path_or_paths) == 1
Posted by GitBox <gi...@apache.org>.
github-actions[bot] commented on PR #12797:
URL: https://github.com/apache/arrow/pull/12797#issuecomment-1088542177
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Thanks for opening a pull request!
If this is not a [minor PR](https://github.com/apache/arrow/blob/master/CONTRIBUTING.md#Minor-Fixes). Could you open an issue for this pull request on JIRA? https://issues.apache.org/jira/browse/ARROW
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Then could you also rename pull request title in the following format?
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or
MINOR: [${COMPONENT}] ${SUMMARY}
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* [Other pull requests](https://github.com/apache/arrow/pulls/)
* [Contribution Guidelines - How to contribute patches](https://arrow.apache.org/docs/developers/contributing.html#how-to-contribute-patches)
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[GitHub] [arrow] raulcd closed pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
Posted by GitBox <gi...@apache.org>.
raulcd closed pull request #12797: ARROW-13922: [Python] Fix ParquetDataset throw error when len(path_or_paths) == 1
URL: https://github.com/apache/arrow/pull/12797
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