Sync from v0.13

examples/pooling/classify/openai_classification_client.py

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+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""Example Python client for classification API using vLLM API server
+NOTE:
+    start a supported classification model server with `vllm serve`, e.g.
+    vllm serve jason9693/Qwen2.5-1.5B-apeach
+"""
+
+import argparse
+import pprint
+
+import requests
+
+
+def post_http_request(payload: dict, api_url: str) -> requests.Response:
+    headers = {"User-Agent": "Test Client"}
+    response = requests.post(api_url, headers=headers, json=payload)
+    return response
+
+
+def parse_args():
+    parse = argparse.ArgumentParser()
+    parse.add_argument("--host", type=str, default="localhost")
+    parse.add_argument("--port", type=int, default=8000)
+    parse.add_argument("--model", type=str, default="jason9693/Qwen2.5-1.5B-apeach")
+    return parse.parse_args()
+
+
+def main(args):
+    host = args.host
+    port = args.port
+    model_name = args.model
+
+    api_url = f"http://{host}:{port}/classify"
+    prompts = [
+        "Hello, my name is",
+        "The president of the United States is",
+        "The capital of France is",
+        "The future of AI is",
+    ]
+
+    payload = {
+        "model": model_name,
+        "input": prompts,
+    }
+
+    classify_response = post_http_request(payload=payload, api_url=api_url)
+    pprint.pprint(classify_response.json())
+
+
+if __name__ == "__main__":
+    args = parse_args()
+    main(args)