improve code quality

telebot/__init__.py

@@ -6080,11 +6080,13 @@ class TeleBot:
                 for handler in handlers:
                     if self._test_message_handler(handler, message):
                         if handler.get('pass_bot', False):
-                            handler['function'](message, bot = self)
+                            result = handler['function'](message, bot=self)
                         else:
-                            handler['function'](message)
+                            result = handler['function'](message)
+                        if not isinstance(result, ContinueHandling):
                             break
-        else:
+            return
+
         data = {}
         params =[]
         handler_error = None
@@ -6107,7 +6109,7 @@ class TeleBot:
                 elif isinstance(result, SkipHandler):
                     skip_handlers = True
 
-            if handlers and not(skip_handlers):
+        if handlers and not skip_handlers:
             try:
                 for handler in handlers:
                     process_handler = self._test_message_handler(handler, message)

telebot/handler_backends.py

@@ -249,6 +249,8 @@ class SkipHandler:
     Update will go to post_process,
     but will skip execution of handler.
     """
+    def __init__(self) -> None:
+        pass
 
 
 class CancelUpdate:
@@ -259,6 +261,9 @@ class CancelUpdate:
     Update will skip handler and execution
     of post_process in middlewares.
     """
+    def __init__(self) -> None:
+        pass
+
 
 class ContinueHandling:
     """
@@ -266,3 +271,6 @@ class ContinueHandling:
     Just return instance of this class 
     in handlers to continue process.
     """
+    def __init__(self) -> None:
+        pass
+