feat: 新增技能扩展N5一章相关示例源码

code/newsletter/N5/exceptions.py

@@ -0,0 +1,48 @@
+class InvalidTypeError(Exception):
+    def __init__(self, value, code, detail, *args) -> None:
+        super().__init__(value, *args)
+        self.code = code
+        self.detail = detail
+
+    def __repr__(self) -> str:
+        return self.detail
+
+
+def check(v, klass):
+    klass_names = [k.__name__ for k in klass]
+
+    if not isinstance(v, tuple(klass)):
+        raise InvalidTypeError(
+            f"{v.__class__.__name__} class is unknown, use {klass_names}.",
+            code=500,
+            detail={"value": v, "type": v.__class__.__name__},
+        )
+    return v
+
+
+def add(a, b):
+    klass = [int, float]
+    try:
+        a = check(a, klass)
+        b = check(b, klass)
+    except InvalidTypeError as e:
+        error = {
+            "name": InvalidTypeError.__name__,
+            "code": e.code,
+            "detail": e.detail,
+        }
+        raise TypeError(error) from e
+
+    return a + b
+
+
+def main():
+
+    try:
+        print(add(1, "2"))
+    except TypeError as e:
+        print(e.args)
+
+
+if __name__ == '__main__':
+    main()