zero323 commented on pull request #32431:
URL: https://github.com/apache/spark/pull/32431#issuecomment-1029864676
@drernie
> Which doesn't even seem to be documented for Python:
That's nothing more than standard Python unpacking. Can be done with any
Python function and ones supporting variadic arguments (`*cols`) in particular.
Could be changed to
```python
df.select(["*"] + [
F.sum(col).over(windowval).alias(col_name)
for col, col_name in zip(["A", "B", "C"], ["cumA",
"cumB", "cumC"])
])
```
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