diff --git a/iamai/bot.py b/iamai/bot.py
index b41372cf..6ff4a952 100644
--- a/iamai/bot.py
+++ b/iamai/bot.py
@@ -86,9 +86,7 @@ class Bot:
     plugin_state: Dict[str, Any]
     global_state: Dict[Any, Any]
 
-    _condition: (
-        asyncio.Condition
-    )  # Condition used to handle get # pyright: ignore[reportUninitializedInstanceVariable]
+    _condition: asyncio.Condition  # Condition used to handle get # pyright: ignore[reportUninitializedInstanceVariable]
     _current_event: Optional[Event[Any]]  # Event currently pending
 
     _restart_flag: bool  # Restart flag
@@ -769,7 +767,7 @@ def load_plugins(
         """Load the plugin.
 
         Args:
-            *plugins: ``Plugin`` class, plugin module name or plug-in module file path. 
+            *plugins: ``Plugin`` class, plugin module name or plug-in module file path.
                 Type can be ``Type[Plugin]``, ``str`` or ``pathlib.Path``.
                 If it is ``Type[Plugin]``, it will be loaded as a plug-in class.
                 If it is of type ``str``, it will be loaded as the plug-in module name, and the format is the same as the Python ``import`` statement.
@@ -780,6 +778,7 @@ def load_plugins(
         self._extend_plugins.extend(plugins)
 
         return self._load_plugins(*plugins)
+
     def _load_plugins_from_dirs(self, *dirs: Path) -> None:
         """Load plug-ins from the directory. Plug-ins in modules starting with ``_`` will not be imported. The path can be a relative path or an absolute path.
 
diff --git a/iamai/message.py b/iamai/message.py
index 148cf2d1..6585b0de 100644
--- a/iamai/message.py
+++ b/iamai/message.py
@@ -333,7 +333,7 @@ class MessageSegment(ABC, BaseModel, Mapping[str, Any], Generic[MessageT]):
     Attributes:
         type: message field type.
         data: message field content.
-     """
+    """
 
     type: str
     data: Dict[str, Any] = Field(default_factory=dict)
@@ -357,7 +357,7 @@ def from_str(cls, msg: str) -> Self:
 
         Returns:
             Message fields converted by ``str``.
-         """
+        """
 
     @classmethod
     def from_mapping(cls, msg: Mapping[Any, Any]) -> Self:
@@ -458,8 +458,9 @@ def __eq__(self, other: object) -> bool:
             and self.type == other.type
             and self.data == other.data
         )
+
     def __ne__(self, other: object) -> bool:
-         """Determine whether they are not equal.
+        """Determine whether they are not equal.
 
         Args:
             other: other objects.
@@ -467,7 +468,7 @@ def __ne__(self, other: object) -> bool:
         Returns:
             Whether they are not equal.
         """
-         return not self.__eq__(other)
+        return not self.__eq__(other)
 
     def __add__(self, other: Any) -> MessageT:
         """Method for adding custom message fields to other objects.
@@ -508,9 +509,9 @@ def items(self) -> ItemsView[str, Any]:
         return self.data.items()
 
     def is_text(self) -> bool:
-        """ is a plain text message field.
+        """is a plain text message field.
 
         Returns:
             Whether it is a plain text message field.
         """
-        return self.type == "text"
\ No newline at end of file
+        return self.type == "text"
diff --git a/iamai/utils.py b/iamai/utils.py
index 91e9ab95..bf38302a 100644
--- a/iamai/utils.py
+++ b/iamai/utils.py
@@ -230,7 +230,7 @@ async def sync_ctx_manager_wrapper(
 
 
 def wrap_get_func(
-    func: Optional[Callable[[EventT], Union[bool, Awaitable[bool]]]]
+    func: Optional[Callable[[EventT], Union[bool, Awaitable[bool]]]],
 ) -> Callable[[EventT], Awaitable[bool]]:
     """Wrap the parameters accepted by the ``get()`` function into an asynchronous function.
 
@@ -252,7 +252,7 @@ def wrap_get_func(
 else:  # pragma: no cover
 
     def get_annotations(
-        obj: Union[Callable[..., object], Type[Any], ModuleType]
+        obj: Union[Callable[..., object], Type[Any], ModuleType],
     ) -> Dict[str, Any]:
         """Compute the annotation dictionary of an object.