raulcd commented on code in PR #13327:
URL: https://github.com/apache/arrow/pull/13327#discussion_r892104449
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python/pyarrow/_compute.pyx:
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@@ -2047,6 +2047,60 @@ class RandomOptions(_RandomOptions):
self._set_options(length, initializer)
+cdef class _RankOptions(FunctionOptions):
+
+ _tiebreaker_map = {
+ "Min": CRankOptionsTiebreaker_MIN,
+ "Max": CRankOptionsTiebreaker_MAX,
+ "First": CRankOptionsTiebreaker_FIRST,
+ "Dense": CRankOptionsTiebreaker_DENSE,
+ }
+
+ def _set_options(self, sort_keys, null_placement, tiebreaker):
+ cdef vector[CSortKey] c_sort_keys
+ for name, order in sort_keys:
+ c_sort_keys.push_back(
+ CSortKey(tobytes(name), unwrap_sort_order(order))
+ )
+ try:
+ self.wrapped.reset(
+ new CRankOptions(c_sort_keys,
unwrap_null_placement(null_placement), self._tiebreaker_map[tiebreaker])
+ )
+ except KeyError:
+ _raise_invalid_function_option(tiebreaker, "tiebreaker")
+
+
+class RankOptions(_RankOptions):
+ """
+ Options for the `rank` function.
+
+ Parameters
+ ----------
+ sort_keys : sequence of (name, order) tuples
+ Names of field/column keys to sort the input on,
+ along with the order each field/column is sorted in.
+ Accepted values for `order` are "ascending", "descending".
+ null_placement : str, default "at_end"
+ Where nulls in input should be sorted, only applying to
+ columns/fields mentioned in `sort_keys`.
+ Accepted values are "at_start", "at_end".
+ tiebreaker : str, default "First"
+ Configure how ties between equal values are handled.
+ Accepted values are:
+
+ - "Min": Ties get the smallest possible rank in sorted order.
Review Comment:
Updated to lower case keywords
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