Sync.

source/logger.py

@@ -4,14 +4,39 @@ class logger:
     def __init__(self) -> None:
         self.__handlers = set()
 
-    def _on_all(self, content: str) -> None:
-        for handler in self.__handlers:
-            handler(content)
+    def _get_message(self, *args, **kwargs) -> str:
+        if len(kwargs) == 0:
+            return self.__get_message_from_args(self, *args)
 
-    async def _on_all_async(self, content: str) -> None:
-        for handler in self.__handlers:
-            await handler.add(content)
+        if len(args) != 1:
+            raise RuntimeError("You must specify output format.")
 
+        return self.__get_message_from_kwargs(self, args[0], **kwargs)
+
+    def __get_message_from_args(self, *args) -> str:
+        line = ""
+
+        for count in args:
+            typed = type(count)
+
+            if typed is str:
+                line = line + count + " "
+                continue
+            
+            if typed is int or typed is float or typed is bool:
+                line = line + str(count) + " "
+                continue
+
+            line = line + repr(count) + " "
+
+        if len(args) > 0:
+            line = line[0:-1]
+
+        return line
+
+    def __get_message_from_kwargs(self, formation: str, **kwargs) -> str:
+        return formation.format(**kwargs)   
+    
     def use_handler(self, target: handler) -> None:
         self.__handlers.add(target)