Pxd definition fixes

python/pyarrow/dataset.py

@@ -54,7 +54,6 @@ from pyarrow._dataset import (  # noqa
     Scanner,
     ScannerBuilder,
     ScanOptions,
-    ScanOptions,
     ScanTask,
     SchemaPartitionScheme,
     SimpleDataFragment,

python/pyarrow/includes/common.pxd

@@ -19,7 +19,7 @@
 
 from libc.stdint cimport *
 from libcpp cimport bool as c_bool, nullptr
-from libcpp.memory cimport shared_ptr, unique_ptr, make_shared, make_unique
+from libcpp.memory cimport shared_ptr, unique_ptr, make_shared
 from libcpp.string cimport string as c_string
 from libcpp.utility cimport pair
 from libcpp.vector cimport vector

python/pyarrow/includes/libarrow_dataset.pxd

@@ -104,19 +104,20 @@ cdef extern from "arrow/dataset/api.h" namespace "arrow::dataset" nogil:
         pass
 
     cdef cppclass CNotExpression "arrow::dataset::NotExpression"(
-            CBinaryExpression):
+            CUnaryExpression):
         pass
 
     cdef cppclass CIsValidExpression "arrow::dataset::IsValidExpression"(
-            CBinaryExpression):
+            CUnaryExpression):
         pass
 
     cdef cppclass CCastExpression "arrow::dataset::CastExpression"(
-            CExpression):
+            CUnaryExpression):
         CCastExpression(CExpressionPtr operand, shared_ptr[CDataType] to,
                         CCastOptions options)
 
-    cdef cppclass CInExpression "arrow::dataset::InExpression"(CExpression):
+    cdef cppclass CInExpression "arrow::dataset::InExpression"(
+            CUnaryExpression):
         CInExpression(CExpressionPtr operand, shared_ptr[CArray] set)
 
     cdef shared_ptr[CNotExpression] MakeNotExpression "arrow::dataset::not_"(