Added a separate logging module

flask/app.py

@@ -300,22 +300,9 @@ class Flask(_PackageBoundObject):
         with _logger_lock:
             if self._logger and self._logger.name == self.logger_name:
                 return self._logger
-            from logging import getLogger, StreamHandler, Formatter, \
-                                Logger,  DEBUG
-            class DebugLogger(Logger):
-                def getEffectiveLevel(x):
-                    return DEBUG if self.debug else Logger.getEffectiveLevel(x)
-            class DebugHandler(StreamHandler):
-                def emit(x, record):
-                    StreamHandler.emit(x, record) if self.debug else None
-            handler = DebugHandler()
-            handler.setLevel(DEBUG)
-            handler.setFormatter(Formatter(self.debug_log_format))
-            logger = getLogger(self.logger_name)
-            logger.__class__ = DebugLogger
-            logger.addHandler(handler)
-            self._logger = logger
-            return logger
+            from flask.logging import create_logger
+            self._logger = rv = create_logger(self)
+            return rv
 
     def create_jinja_environment(self):
         """Creates the Jinja2 environment based on :attr:`jinja_options`