sanjibansg commented on a change in pull request #12560:
URL: https://github.com/apache/arrow/pull/12560#discussion_r828244263
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File path: python/pyarrow/_dataset.pyx
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@@ -2019,9 +2023,12 @@ cdef class Scanner(_Weakrefable):
dataset : Dataset
Dataset to scan.
columns : list of str or dict, default None
- The columns to project. This can be a list of column names to include
- (order and duplicates will be preserved), or a dictionary with
- {new_column_name: expression} values for more advanced projections.
+ The columns to project. This can be a list of column names to
+ include (order and duplicates will be preserved) which may contain the
+ augmented fields such as `batch_index`, `fragment_index`,
+ `last_in_fragment` and `filename`, or a dictionary
+ with {new_column_name: expression} values for more advanced
+ projections.
Review comment:
I am not very sure about the common template doctoring in `_dataset.pyx`.
Do you mean something like this?
https://github.com/apache/arrow/blob/4f2e5cc6669aa68dcdf9c876115cf7d1146c8cd5/python/pyarrow/_dataset.pyx#L352
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