Hi - I am working with a storage format meant to be PyArrow Dataset compatible.
PyArrow datasets support specifying a filter, written using pyarrow.compute
expressions, -
[link](https://arrow.apache.org/docs/dev/python/generated/pyarrow.dataset.Expression.html).
Does the pyarrow API provide a mechanism to serialize compute expressions to a
standard format like substrait? I want to analyze the filter expression, and
push down some of its execution to the storage engine.
Note that casting the filter expression to a string and parsing it is an
option, but things like the isin​ operator don't produce easy to parse strings.
```py
x = pc.field("colA")
z = (x > 3) & x.isin([10, 11])
str(z)
# '((colA > 3) and is_in(colA, {value_set=int64:[\n 10,\n 11\n],
skip_nulls=false}))'
```
Thank you,
Ishan
