ianmcook commented on code in PR #12460:
URL: https://github.com/apache/arrow/pull/12460#discussion_r846110288
##########
docs/source/python/api/compute.rst:
##########
@@ -45,6 +45,21 @@ Aggregations
tdigest
variance
+Cumulative Functions
+--------------------
+
+Cumulative functions are vector functions that perform a running total on its
+input and outputs an array containing the corresponding intermediate running
values.
Review Comment:
>Is this what's expected
Yes I think so.
I am worried that users will will _think_ this function does this:
```python
>>> import pyarrow as pa
>>> import pyarrow.compute as pc
>>> t = pa.table({'x':[1, 2, 3, 4]})
>>> pc.cumulative_sum(t, ['x'])
pyarrow.Table
x: int64
----
x: [[1,3,6,10]]
```
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