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https://issues.apache.org/jira/browse/ARROW-480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16238931#comment-16238931
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ASF GitHub Bot commented on ARROW-480:
--------------------------------------
xhochy commented on a change in pull request #1215: ARROW-480: [Python]
Implement RowGroupMetaData.ColumnChunk
URL: https://github.com/apache/arrow/pull/1215#discussion_r148928449
##########
File path: python/pyarrow/tests/test_parquet.py
##########
@@ -469,14 +469,62 @@ def test_parquet_metadata_api():
schema[-1]
# Row group
- rg_meta = meta.row_group(0)
- repr(rg_meta)
+ for rg in range(meta.num_row_groups):
+ rg_meta = meta.row_group(rg)
+ repr(rg_meta)
+
+ for col in range(rg_meta.num_columns):
+ col_meta = rg_meta.column(col)
+ repr(col_meta)
assert rg_meta.num_rows == len(df)
assert rg_meta.num_columns == ncols + 1 # +1 for index
@parquet
+@pytest.mark.parametrize(
+ 'data, dtype, min_value, max_value, null_count, num_values',
+ [
+ ([1, 2, 2, None, 4], np.uint8, u'1', u'4', 1, 4),
+ ([1, 2, 2, None, 4], np.uint16, u'1', u'4', 1, 4),
+ ([1, 2, 2, None, 4], np.uint32, u'1', u'4', 1, 4),
+ ([1, 2, 2, None, 4], np.uint64, u'1', u'4', 1, 4),
+ ([-1, 2, 2, None, 4], np.int16, u'-1', u'4', 1, 4),
+ ([-1, 2, 2, None, 4], np.int32, u'-1', u'4', 1, 4),
+ ([-1, 2, 2, None, 4], np.int64, u'-1', u'4', 1, 4),
+ ([-1.1, 2.2, 2.3, None, 4.4], np.float32, u'-1.1', u'4.4', 1, 4),
+ ([-1.1, 2.2, 2.3, None, 4.4], np.float64, u'-1.1', u'4.4', 1, 4),
+ (
+ [u'', u'b', unichar(1000), None, u'aaa'],
+ str, u' ', unichar(1000).encode('utf-8') + ' ', 1, 4
Review comment:
This line fails with Python 3, you probably need to change it to `,
unichar(1000).encode('utf-8') + b' '`.
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> [Python] Add accessors for Parquet column statistics
> -----------------------------------------------------
>
> Key: ARROW-480
> URL: https://issues.apache.org/jira/browse/ARROW-480
> Project: Apache Arrow
> Issue Type: New Feature
> Components: Python
> Reporter: Wes McKinney
> Assignee: Licht Takeuchi
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.9.0
>
>
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