dgd-contributor opened a new pull request #33968:
URL: https://github.com/apache/spark/pull/33968
### What changes were proposed in this pull request?
Fix update a series by another in same frame
also add test for update series by one in diff frame
### Why are the changes needed?
Fix update a series by another in same frame
### Does this PR introduce _any_ user-facing change?
Before
```python
>>> psdf = ps.DataFrame(
... {"a": [None, 2, 3, 4, 5, 6, 7, 8, None], "b": [None, 5, None, 3, 2,
1, None, 0, 0]},
... )
>>> psdf
a b
0 NaN NaN
1 2.0 5.0
2 3.0 NaN
3 4.0 3.0
4 5.0 2.0
5 6.0 1.0
6 7.0 NaN
7 8.0 0.0
8 NaN 0.0
>>> psdf.a.update(psdf.b)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/dgd/spark/python/pyspark/pandas/series.py", line 4551, in
update
combined = combine_frames(self._psdf, other._psdf, how="leftouter")
File "/Users/dgd/spark/python/pyspark/pandas/utils.py", line 141, in
combine_frames
assert not same_anchor(
AssertionError: We don't need to combine. `this` and `that` are same.
>>>
```
After
```python
>>> psdf = ps.DataFrame(
... {"a": [None, 2, 3, 4, 5, 6, 7, 8, None], "b": [None, 5, None, 3, 2,
1, None, 0, 0]},
... )
>>> psdf
a b
0 NaN NaN
1 2.0 5.0
2 3.0 NaN
3 4.0 3.0
4 5.0 2.0
5 6.0 1.0
6 7.0 NaN
7 8.0 0.0
8 NaN 0.0
>>> psdf.a.update(psdf.b)
>>> psdf
a b
0 NaN NaN
1 5.0 5.0
2 3.0 NaN
3 3.0 3.0
4 2.0 2.0
5 1.0 1.0
6 7.0 NaN
7 0.0 0.0
8 0.0 0.0
>>>
```
### How was this patch tested?
unit tests
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