zhengruifeng opened a new pull request, #44422:
URL: https://github.com/apache/spark/pull/44422
### What changes were proposed in this pull request?
add `Column.isNaN` in pyspark
### Why are the changes needed?
`Column.isNaN` was added in scala since 1.5.0, but it is still missing in
python
this pr adds it for parity
### Does this PR introduce _any_ user-facing change?
yes
```
In [1]: from pyspark.sql import Row
In [2]: df = spark.createDataFrame([Row(name='Tom', height=80.0),
Row(name='Alice', height=float('nan'))])
In [3]: df.show()
+-----+------+
| name|height|
+-----+------+
| Tom| 80.0|
|Alice| NaN|
+-----+------+
In [4]: df.filter(df.height.isNaN()).show()
+-----+------+
| name|height|
+-----+------+
|Alice| NaN|
+-----+------+
```
### How was this patch tested?
added doctest
### Was this patch authored or co-authored using generative AI tooling?
no
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