support acompletion + stream for ollama

litellm/llms/ollama.py

@@ -1,5 +1,6 @@
 import requests
 import json
+from async_generator import async_generator, yield_
 
 # ollama implementation
 def get_ollama_response_stream(
@@ -33,3 +34,37 @@ def get_ollama_response_stream(
                 except Exception as e:
                     print(f"Error decoding JSON: {e}")
     session.close()
+
+# ollama implementation
+@async_generator
+async def async_get_ollama_response_stream(
+        api_base="http://localhost:11434", 
+        model="llama2", 
+        prompt="Why is the sky blue?"
+    ):
+    url = f"{api_base}/api/generate"
+    data = {
+        "model": model,
+        "prompt": prompt,
+    }
+    session = requests.Session()
+
+    with session.post(url, json=data, stream=True) as resp:
+        for line in resp.iter_lines():
+            if line:
+                try:
+                    json_chunk = line.decode("utf-8")
+                    chunks = json_chunk.split("\n")
+                    for chunk in chunks:
+                        if chunk.strip() != "":
+                            j = json.loads(chunk)
+                            if "response" in j:
+                                completion_obj = {
+                                    "role": "assistant",
+                                    "content": "",
+                                }
+                                completion_obj["content"] = j["response"]
+                                await yield_({"choices": [{"delta": completion_obj}]})
+                except Exception as e:
+                    print(f"Error decoding JSON: {e}")
+    session.close()

litellm/main.py

@@ -75,7 +75,7 @@ async def acompletion(*args, **kwargs):
     loop = asyncio.get_event_loop()
 
     # Use a partial function to pass your keyword arguments
-    func = partial(completion, *args, **kwargs)
+    func = partial(completion, *args, **kwargs, acompletion=True)
 
     # Add the context to the function
     ctx = contextvars.copy_context()
@@ -180,6 +180,7 @@ def completion(
     fallbacks=[],
     caching = False,
     cache_params = {}, # optional to specify metadata for caching
+    acompletion=False,
 ) -> ModelResponse:
     """
     Perform a completion() using any of litellm supported llms (example gpt-4, gpt-3.5-turbo, claude-2, command-nightly)
@@ -928,6 +929,10 @@ def completion(
             logging.pre_call(
                 input=prompt, api_key=None, additional_args={"endpoint": endpoint}
             )
+            if acompletion == True:
+                async_generator = ollama.async_get_ollama_response_stream(endpoint, model, prompt)
+                return async_generator
+
             generator = ollama.get_ollama_response_stream(endpoint, model, prompt)
             if optional_params.get("stream", False) == True:
                 # assume all ollama responses are streamed