Update ampache.py

Author: lachlan-00

src/ampache.py

@@ -260,7 +260,7 @@ def return_data(self, data):
         # xml format
         else:
             try:
-                tree = ElementTree.fromstring(data.decode('utf-8'))
+                tree = data if isinstance(data, ElementTree.Element) else ElementTree.fromstring(data.decode('utf-8') if isinstance(data, bytes) else data)
             except ElementTree.ParseError:
                 return False
             return tree
@@ -565,7 +565,7 @@ def handshake(self, ampache_url: str, ampache_api: str, ampache_user=False,
         # xml format
         else:
             try:
-                tree = ElementTree.fromstring(ampache_response.decode('utf-8'))
+                tree = ampache_response if isinstance(ampache_response, ElementTree.Element) else ElementTree.fromstring(ampache_response.decode('utf-8') if isinstance(ampache_response, bytes) else ampache_response)
             except ElementTree.ParseError:
                 return False
             try:
@@ -617,7 +617,7 @@ def ping(self, ampache_url: str, ampache_api=False, version: str = '6.6.0'):
         # xml format
         else:
             try:
-                tree = ElementTree.fromstring(ampache_response.decode('utf-8'))
+                tree = ampache_response if isinstance(ampache_response, ElementTree.Element) else ElementTree.fromstring(ampache_response.decode('utf-8') if isinstance(ampache_response, bytes) else ampache_response)
             except ElementTree.ParseError:
                 return False
             try: