Actually add file >.>

sanic/default_filter.py

@@ -0,0 +1,13 @@
+import logging
+
+
+class DefaultFilter(logging.Filter):
+    def __init__(self, param=None):
+        self.param = param
+
+    def filter(self, record):
+        if self.param is None:
+            return True
+        if record.levelno in self.param:
+            return True
+        return False