From 4e0bc3bab61124e5c8d29743d77541de052c44d8 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Mon, 22 Mar 2021 19:44:56 +1100
Subject: [PATCH] Use quantization method attributes

---
 src/PIL/Image.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/PIL/Image.py b/src/PIL/Image.py
index 2e7abfb68..5e9d9a89f 100644
--- a/src/PIL/Image.py
+++ b/src/PIL/Image.py
@@ -1074,11 +1074,11 @@ class Image:
 
         if method is None:
             # defaults:
-            method = 0
+            method = MEDIANCUT
             if self.mode == "RGBA":
-                method = 2
+                method = FASTOCTREE
 
-        if self.mode == "RGBA" and method not in (2, 3):
+        if self.mode == "RGBA" and method not in (FASTOCTREE, LIBIMAGEQUANT):
             # Caller specified an invalid mode.
             raise ValueError(
                 "Fast Octree (method == 2) and libimagequant (method == 3) "