update

python/pyarrow/serialization.pxi

@@ -43,9 +43,6 @@ class DeserializationCallbackError(ArrowSerializationError):
         self.type_id = type_id
 
 
-_default_serialization_context = SerializationContext()
-
-
 cdef class SerializationContext:
     cdef:
         object type_to_type_id
@@ -141,6 +138,9 @@ cdef class SerializationContext:
         return obj
 
 
+_default_serialization_context = SerializationContext()
+
+
 cdef class SerializedPyObject:
     """
     Arrow-serialized representation of Python object