Direction of comparison operator in error message does not depend on direction in code

Bug Report

When encountering an error due to using a comparison operator with None as one of the arguments, Mypy adjusts the direction of < and > operators in its messages based on the types involved so that it always reports None as the second type (e.g. Unsupported operand types for {comparisson operator direction} ("int" and "None")). This becomes increasingly confusing when both variables in the comparison could potentially be a large number of types.

To reproduce

For the following code

1 < None
1 > None
None < 1
None > 1

Expected Behavior

file.py:1: error: Unsupported operand types for < ("int" and "None")  [operator]
file.py:2: error: Unsupported operand types for > ("int" and "None")  [operator]
file.py:3: error: Unsupported operand types for < ("None" and "int")  [operator]
file.py:4: error: Unsupported operand types for > ("None" and "int")  [operator]

Actual Behavior

file.py:1: error: Unsupported operand types for < ("int" and "None")  [operator]
file.py:2: error: Unsupported operand types for > ("int" and "None")  [operator]
file.py:3: error: Unsupported operand types for > ("int" and "None")  [operator]
file.py:4: error: Unsupported operand types for < ("int" and "None")  [operator]

Your Environment

• Mypy version used: 1.10
• Python version used: 3.12

まず、mypy 1.10 で issue にある4つの比較ケースを再現し、次に、サポートされていないオペランド型をフォーマットする診断パスを追跡します。両方のオペランド順序についてリグレッションカバレッジを追加し、各メッセージが期待される出力に示されたソース演算子とオペランド順序を保持することを確認します。