Support min_tokens in sgl.gen (#1573)

python/sglang/api.py

@@ -69,6 +69,7 @@ def get_server_args(backend: Optional[BaseBackend] = None):
 def gen(
     name: Optional[str] = None,
     max_tokens: Optional[int] = None,
+    min_tokens: Optional[int] = None,
     stop: Optional[Union[str, List[str]]] = None,
     stop_token_ids: Optional[List[int]] = None,
     temperature: Optional[float] = None,
@@ -108,6 +109,7 @@ def gen(
     return SglGen(
         name,
         max_tokens,
+        min_tokens,
         stop,
         stop_token_ids,
         temperature,
@@ -147,6 +149,7 @@ def gen_int(
     return SglGen(
         name,
         max_tokens,
+        None,
         stop,
         stop_token_ids,
         temperature,
@@ -185,6 +188,7 @@ def gen_string(
     return SglGen(
         name,
         max_tokens,
+        None,
         stop,
         stop_token_ids,
         temperature,