diff.patch returns wrong dates in Python 3.10

表示される日付をフォーマットする diff.patch パスから始め、Arrow のタイムスタンプがどのようにシリアライズされるかを追跡します。Python 3.10 と arrow==1.2.2 で出力を再現し、その後、diff.patch に bound-method の表現ではなくタイムスタンプ値が含まれていることを確認します。

The newest version of arrow library doesn't have timestamp property anymore, only method.

When I try to run the pygit2 with latest arrow (arrow==1.2.2) I get this in the output of diff.patch:

diff --git a/ff637b965cc54980ba5d852d662d0793 b/ff637b965cc54980ba5d852d662d0793                                                                                                                                                              
index d88c807..1d33f32 100644                                                                                                                                                                                                                 
--- a/ff637b965cc54980ba5d852d662d0793                                                                                                                                                                                                        +++ b/ff637b965cc54980ba5d852d662d0793                                                                                                                                                                                                        @@ -62,7 +62,9 @@                                                                                                                                                                                                                                  "content": "We should work on this",                                                                                                                                                                                                     
     "custom_fields": [],                                                                                                                                                                                                                     
     "date_created": "<bound method Arrow.timestamp of <Arrow [2022-02-02T14:55:22.090307+00:00]>>",                                                                                                                                          
-    "depends": [],                                                                                                                                                                                                                           
+    "depends": [                                                                                                                                                                                                                             +        "3"                                                                                                                                                                                                                                  +    ],                                                                                                                                                                                                                                            "full_url": "http://localhost.localdomain/test/issue/1",                                                                                                                                                                                 
     "id": 1,                                                                                                                                                                                                                                 
     "last_updated": "<bound method Arrow.timestamp of <Arrow [2022-02-02T14:55:23.637241+00:00]>>",

As you can see there is only a reference to method instead of value.