westonpace commented on code in PR #34429:
URL: https://github.com/apache/arrow/pull/34429#discussion_r1127140078
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python/pyarrow/_dataset.pyx:
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@@ -891,8 +891,13 @@ cdef class FileFormat(_Weakrefable):
filesystem : Filesystem, optional
If `filesystem` is given, `file` must be a string and specifies
the path of the file to read from the filesystem.
- partition_expression : Expression
+ partition_expression : Expression, optional
The filter expression.
Review Comment:
```suggestion
An expression that is guaranteed true for all rows in the
fragment. Allows
fragment to be potentially skipped while scanning with a filter.
```
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