Avoid side effects if chat message contains images

Author: tillfalko

ollama/_client.py

@@ -7,6 +7,7 @@
 import urllib.parse
 from os import PathLike
 from pathlib import Path
+from copy import deepcopy
 from hashlib import sha256
 from base64 import b64encode, b64decode
 
@@ -164,6 +165,8 @@ def chat(
     if not model:
       raise RequestError('must provide a model')
 
+    messages = deepcopy(messages)
+
     for message in messages or []:
       if not isinstance(message, dict):
         raise TypeError('messages must be a list of Message or dict-like objects')
@@ -446,6 +449,8 @@ async def chat(
     if not model:
       raise RequestError('must provide a model')
 
+    messages = deepcopy(messages)
+
     for message in messages or []:
       if not isinstance(message, dict):
         raise TypeError('messages must be a list of strings')