added a inner mehtod to help clean up repeated code for dicts

instrumentation/opentelemetry-instrumentation-asgi/src/opentelemetry/instrumentation/asgi/__init__.py

@@ -193,7 +193,7 @@ def client_response_hook(span: Span, message: dict):
 import urllib
 from functools import wraps
 from timeit import default_timer
-from typing import Tuple
+from typing import Tuple, List, Dict
 
 from asgiref.compatibility import guarantee_single_callable
 
@@ -277,19 +277,23 @@ def append_keys(key):
             if isinstance(key, bytes):
                     returnable.append(key.decode("utf8"))
             elif isinstance(key, str):
-                    returnable.append(key)            
+                    returnable.append(key)    
 
-        #carrier is a dict, so iterate over .items()
-        for _key, _val in carrier.items():
-
-            #if we have another dict, lets make a recursive call
-            if isinstance(_val, Dict):
+        def append_dict_keys(key, val):
                 #append our current key
                 append_keys(_key)
 
                 #append all keys within the dict
                 for x in self.keys(_val):
-                    append_keys(x)
+                    append_keys(x)                    
+
+        #carrier is a dict, so iterate over .items()
+        for _key, _val in carrier.items():
+
+            #if we have another dict, lets make a recursive call
+            if isinstance(_val, Dict):
+
+                append_dict_keys(_key, _val)
 
             # if we have a list, lets iter over that. List can contain tuples(headers) dicts and string so lets approach them all as well
             elif isinstance(_val, List):
@@ -301,11 +305,9 @@ def append_keys(key):
 
                     #check for the dict   
                     elif isinstance(list_key, Dict):
-                        append_keys(_key)
 
-                        #append all keys within the dict
-                        for x in self.keys(_val):
-                            append_keys(x)
+                        append_dict_keys(_key, _val)
+
                     else:
                         append_keys(list_key)