Improvement[Community] Improve methods in IMessageChatLoader (langc…

…hain-ai#25746)

- Add @staticmethod to static methods in `IMessageChatLoader`.
- Format args name.

libs/community/langchain_community/chat_loaders/imessage.py

@@ -68,7 +68,8 @@ def __init__(self, path: Optional[Union[str, Path]] = None):
                 "Please install it with `pip install pysqlite3`"
             ) from e
 
-    def _parse_attributedBody(self, attributedBody: bytes) -> str:
+    @staticmethod
+    def _parse_attributed_body(attributed_body: bytes) -> str:
         """
         Parse the attributedBody field of the message table
         for the text content of the message.
@@ -88,17 +89,18 @@ def _parse_attributedBody(self, attributedBody: bytes) -> str:
           that byte.
 
         Args:
-            attributedBody (bytes): attributedBody field of the message table.
+            attributed_body (bytes): attributedBody field of the message table.
         Return:
             str: Text content of the message.
         """
-        content = attributedBody.split(b"NSString")[1][5:]
+        content = attributed_body.split(b"NSString")[1][5:]
         length, start = content[0], 1
         if content[0] == 129:
             length, start = int.from_bytes(content[1:3], "little"), 3
         return content[start : start + length].decode("utf-8", errors="ignore")
 
-    def _get_session_query(self, use_chat_handle_table: bool) -> str:
+    @staticmethod
+    def _get_session_query(use_chat_handle_table: bool) -> str:
         # Messages sent pre OSX 12 require a join through the chat_handle_join table
         # However, the table doesn't exist if database created with OSX 12 or above.
 
@@ -151,7 +153,7 @@ def _load_single_chat_session(
             if text:
                 content = text
             elif attributedBody:
-                content = self._parse_attributedBody(attributedBody)
+                content = self._parse_attributed_body(attributedBody)
             else:  # Skip messages with no content
                 continue