Extract generate method

Author: abetlen

llama_cpp/llama.py

@@ -128,6 +128,20 @@ def _sample(self, last_n_tokens, top_p, top_k, temp, repeat_penalty):
             repeat_penalty=repeat_penalty,
         )
 
+    def _generate(self, past_tokens, max_tokens, top_p, top_k, temp, repeat_penalty):
+        last_n_tokens = deque([0] * self.last_n, maxlen=self.last_n)
+        last_n_tokens.extend(past_tokens)
+        for i in range(max_tokens):
+            token = self._sample(
+                last_n_tokens,
+                top_p=top_p,
+                top_k=top_k,
+                temp=temp,
+                repeat_penalty=repeat_penalty
+            )
+            yield token
+            self._eval([token], len(past_tokens) + i)
+
     def __call__(
         self,
         prompt: str,
@@ -162,8 +176,9 @@ def __call__(
         Returns:
             Response object containing the generated text.
         """
+        completion_id = f"cmpl-{str(uuid.uuid4())}"
+        created= int(time.time())
         text = b""
-        finish_reason = "length"
         completion_tokens = []
         last_n_tokens = deque([0] * self.last_n, maxlen=self.last_n)
 
@@ -182,14 +197,8 @@ def __call__(
         if stop is not None:
             stop = [s.encode("utf-8") for s in stop]
 
-        for i in range(max_tokens):
-            token = self._sample(
-                last_n_tokens,
-                top_p=top_p,
-                top_k=top_k,
-                temp=temperature,
-                repeat_penalty=repeat_penalty
-            )
+        finish_reason = None
+        for token in self._generate(prompt_tokens, max_tokens, top_p, top_k, temperature, repeat_penalty):
             if token == llama_cpp.llama_token_eos():
                 finish_reason = "stop"
                 break
@@ -204,7 +213,8 @@ def __call__(
                 finish_reason = "stop"
                 break
 
-            self._eval([token], len(prompt_tokens) + len(completion_tokens))
+        if finish_reason is None:
+            finish_reason = "length"
 
         text = text.decode("utf-8")
 
@@ -220,9 +230,9 @@ def __call__(
             )[:logprobs]
 
         return {
-            "id": f"cmpl-{str(uuid.uuid4())}",  # Likely to change
+            "id": completion_id,
             "object": "text_completion",
-            "created": int(time.time()),
+            "created": created,
             "model": self.model_path,
             "choices": [
                 {