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Author: pre-commit-ci[bot]

tests/test_type_conversion.py

@@ -50,17 +50,14 @@ def opt(user: str | None = None):
     assert result.exit_code == 0
     assert "User: Camila" in result.output
 
+
 @pytest.mark.parametrize(
     ("value", "expected"),
-    [
-        ("0", "ROOTED!"),
-        ("12", "ID: 12"),
-        ("name", "USER: name")
-    ],
+    [("0", "ROOTED!"), ("12", "ID: 12"), ("name", "USER: name")],
 )
 def test_union(value, expected):
     app = typer.Typer()
-    
+
     @app.command()
     def opt(id_or_name: Union[int, str]):
         if isinstance(id_or_name, int):
@@ -70,11 +67,11 @@ def opt(id_or_name: Union[int, str]):
                 print(f"ID: {id_or_name}")
         else:
             print(f"USER: {id_or_name}")
-    
+
     result = runner.invoke(app, [value])
     assert result.exit_code == 0
-    assert expected  in result.output
-        
+    assert expected in result.output
+
 
 def test_optional_tuple():
     app = typer.Typer()

typer/main.py

@@ -700,16 +700,19 @@ def wrapper(**kwargs: Any) -> Any:
     update_wrapper(wrapper, callback)
     return wrapper
 
+
 class UnionParamType(click.ParamType):
     @property
-    def name(self) -> str: # type: ignore
-        return ' | '.join(_type.name for _type in self._types)
+    def name(self) -> str:  # type: ignore
+        return " | ".join(_type.name for _type in self._types)
 
     def __init__(self, types: List[click.ParamType]):
         super().__init__()
         self._types = types
 
-    def convert(self, value: Any, param: Optional[click.Parameter], ctx: Optional[click.Context]) -> Any:
+    def convert(
+        self, value: Any, param: Optional[click.Parameter], ctx: Optional[click.Context]
+    ) -> Any:
         # *types, last = self._types
         error_messages = []
         for _type in self._types:
@@ -719,7 +722,7 @@ def convert(self, value: Any, param: Optional[click.Parameter], ctx: Optional[cl
                 print(type(e))
                 error_messages.append(str(e))
         # return last.convert(value, param, ctx)
-        raise self.fail('\n' + '\nbut also\n'.join(error_messages), param, ctx)
+        raise self.fail("\n" + "\nbut also\n".join(error_messages), param, ctx)
 
 
 def get_click_type(
@@ -813,7 +816,10 @@ def get_click_type(
             case_sensitive=parameter_info.case_sensitive,
         )
     elif get_origin(annotation) is not None and is_union(get_origin(annotation)):
-        types = [get_click_type(annotation=arg, parameter_info=parameter_info) for arg in get_args(annotation)]
+        types = [
+            get_click_type(annotation=arg, parameter_info=parameter_info)
+            for arg in get_args(annotation)
+        ]
         return UnionParamType(types)
     raise RuntimeError(f"Type not yet supported: {annotation}")  # pragma: no cover
 
@@ -866,7 +872,7 @@ def get_click_param(
                     continue
                 types.append(type_)
             if len(types) == 1:
-                main_type, = types
+                (main_type,) = types
                 origin = get_origin(main_type)
             else:
                 for type_ in get_args(main_type):