pitrou commented on a change in pull request #12530:
URL: https://github.com/apache/arrow/pull/12530#discussion_r838321106
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File path: python/pyarrow/_dataset.pyx
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@@ -1299,8 +1300,43 @@ cdef vector[shared_ptr[CArray]]
_partitioning_dictionaries(
return c_dictionaries
+cdef class KeyValuePartitioning(Partitioning):
-cdef class DirectoryPartitioning(Partitioning):
+ cdef:
+ CKeyValuePartitioning* keyvalue_partitioning
+
+ def __init__(self):
+ _forbid_instantiation(self.__class__)
+
+ cdef init(self, const shared_ptr[CPartitioning]& sp):
+ Partitioning.init(self, sp)
+ self.keyvalue_partitioning = <CKeyValuePartitioning*> sp.get()
+ self.wrapped = sp
+ self.partitioning = sp.get()
+
+ @property
+ def dictionaries(self):
+ """
+ The unique values for each partition field, if available.
+
+ Those values are only available if the Partitioning object was
+ created through dataset discovery from a PartitioningFactory, or
+ if the dictionaries were manually specified in the constructor.
+ If not available, this returns None.
Review comment:
Is it still the case that this returns None?
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