xinrong-databricks edited a comment on pull request #35747:
URL: https://github.com/apache/spark/pull/35747#issuecomment-1064637020
The result for the example you give should be
```py
>>> psser = ps.Series(['bat', 'foo', 'bait', 'abc', 'bar', 'zoo'])
>>> psser.replace(to_replace=r'^ba.$', value='new', regex=True)
0 new
1 foo
2 bait # bait is not replaced since it doesn't pattern match `'^ba.$'`
3 abc
4 new
5 zoo
dtype: object
```
The existing example in the PR `psser.replace('ba', 'xx', regex=True)` is to
show even `ba` partially match `bait`, the replacement `xx` is applied to the
whole string `bait`, i.e. `bait` is replaced to `xx`.
I will rephrase the docstring to make it clear. Let me know if you still
have questions.
CC @bjornjorgensen
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