zero323 commented on pull request #34466:
URL: https://github.com/apache/spark/pull/34466#issuecomment-957327097
> 1. I used lots of "cast" to cancel the error, but is there other
better way?
I see that these are primarily related to union attributes. We have ongoing
discussion about this, so it is not a binding opinion, but if it is repeated
usage within the same block you can try asserting at the beginning:
```python
assert self._jvm is not None
...
self._jvm.PythonUtils.getPythonAuthSocketTimeout(self._jsc)
```
or extract local variable with single ignore or cast
```python
jvm = cast(JVMView, self._jvm)
jvm.PythonUtils.getPythonAuthSocketTimeout(self._jsc)
```
In a long run, we might consider adding some helpers to handle such case.
Maybe something like this?
```python
@property
def _jvm(self) -> JVMView:
jvm = SparkContext._jvm
assert jvm is not None
return jvm
```
It is definitely not in the scope of this PR though.
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