edits for feedback

cpp/src/arrow/array.cc

@@ -504,8 +504,8 @@ Status FixedSizeListArray::FromArrays(const std::shared_ptr<Array>& values,
   auto list_type = std::make_shared<FixedSizeListType>(values->type(), list_size);
   std::shared_ptr<Buffer> validity_buf;
 
-  *out = std::make_shared<FixedSizeListArray>(list_type, length, values, validity_buf, -1,
-                                              0);
+  *out = std::make_shared<FixedSizeListArray>(list_type, length, values, validity_buf,
+                                              /*null_count=*/-1, /*offset=*/0);
   return Status::OK();
 }
 

python/pyarrow/array.pxi

@@ -1444,18 +1444,19 @@ cdef class FixedSizeListArray(Array):
     """
 
     @staticmethod
-    def from_arrays(values, int64_t length, MemoryPool pool=None):
+    def from_arrays(values, int64_t list_size, MemoryPool pool=None):
         """
-        Construct ListArray from arrays of int32 offsets and values
+        Construct FixedSizeListArray from array of values and a list length.
 
         Parameters
         ----------
-        offsets : Array (int32 type)
         values : Array (any type)
+        list_size : int
+            The fixed length of the lists.
 
         Returns
         -------
-        list_array : ListArray
+        FixedSizeListArray
         """
         cdef:
             Array _values
@@ -1465,7 +1466,7 @@ cdef class FixedSizeListArray(Array):
 
         with nogil:
             check_status(CFixedSizeListArray.FromArrays(
-                _values.sp_array, length, &out))
+                _values.sp_array, list_size, &out))
         cdef Array result = pyarrow_wrap_array(out)
         result.validate()
         return result
@@ -1476,7 +1477,7 @@ cdef class FixedSizeListArray(Array):
 
     def flatten(self):
         """
-        Unnest this ListArray by one level
+        Unnest this FixedSizeListArray by one level.
 
         Returns
         -------