[
https://issues.apache.org/jira/browse/BEAM-11929?focusedWorklogId=563465&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-563465
]
ASF GitHub Bot logged work on BEAM-11929:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 10/Mar/21 02:38
Start Date: 10/Mar/21 02:38
Worklog Time Spent: 10m
Work Description: udim commented on a change in pull request #14156:
URL: https://github.com/apache/beam/pull/14156#discussion_r590946586
##########
File path: sdks/python/apache_beam/pvalue.py
##########
@@ -666,15 +666,14 @@ def as_dict(self):
return dict(self.__dict__)
def __iter__(self):
- for _, value in sorted(self.__dict__.items()):
+ for _, value in self.__dict__.items():
yield value
def __repr__(self):
- return 'Row(%s)' % ', '.join(
- '%s=%r' % kv for kv in sorted(self.__dict__.items()))
+ return 'Row(%s)' % ', '.join('%s=%r' % kv for kv in self.__dict__.items())
def __hash__(self):
- return hash(type(sorted(self.__dict__.items())))
+ return hash(type(self.__dict__.items()))
def __eq__(self, other):
return type(self) == type(other) and self.__dict__ == other.__dict__
Review comment:
Comparing dicts ignores order. Is that that's intentional?
```
>>> {1:2, 3:4} == {1:2, 3:4}
True
>>> {1:2, 3:4} == {3:4, 1:2}
True
```
##########
File path: sdks/python/apache_beam/pvalue.py
##########
@@ -666,15 +666,14 @@ def as_dict(self):
return dict(self.__dict__)
def __iter__(self):
- for _, value in sorted(self.__dict__.items()):
+ for _, value in self.__dict__.items():
yield value
def __repr__(self):
- return 'Row(%s)' % ', '.join(
- '%s=%r' % kv for kv in sorted(self.__dict__.items()))
+ return 'Row(%s)' % ', '.join('%s=%r' % kv for kv in self.__dict__.items())
def __hash__(self):
- return hash(type(sorted(self.__dict__.items())))
+ return hash(type(self.__dict__.items()))
Review comment:
I tried running this interactively but got the same hash:
```
>>> hash(type({}.items()))
5913863196444
>>> hash(type({1:2}.items()))
5913863196444
```
Is it working as intended?
I guess this is technically okay according to the docs, but probably not
what you wanted: `The only required property is that objects which compare
equal have the same hash value`.
[ref](https://docs.python.org/3/reference/datamodel.html#object.__hash__)
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Issue Time Tracking
-------------------
Worklog Id: (was: 563465)
Time Spent: 2h (was: 1h 50m)
> DataframeTransfom, BatchRowsAsDataFrame do not preserve field order when
> schema created with beam.Row
> -----------------------------------------------------------------------------------------------------
>
> Key: BEAM-11929
> URL: https://issues.apache.org/jira/browse/BEAM-11929
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Affects Versions: 2.26.0, 2.27.0, 2.28.0
> Reporter: Brian Hulette
> Assignee: Brian Hulette
> Priority: P2
> Labels: dataframe-api
> Fix For: 2.29.0
>
> Time Spent: 2h
> Remaining Estimate: 0h
>
> The workaround is to use a NamedTuple instance with DataframeTransform.
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