[Misc] Fix examples openai_pooling_client.py (#24853)

Signed-off-by: wang.yuqi <noooop@126.com>
Co-authored-by: Harry Mellor <19981378+hmellor@users.noreply.github.com>

examples/online_serving/pooling/openai_embedding_client.py

@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""Example Python client for embedding API using vLLM API server
+NOTE:
+    start a supported embeddings model server with `vllm serve`, e.g.
+    vllm serve intfloat/e5-small
+"""
+
+from openai import OpenAI
+
+# Modify OpenAI's API key and API base to use vLLM's API server.
+openai_api_key = "EMPTY"
+openai_api_base = "http://localhost:8000/v1"
+
+
+def main():
+    client = OpenAI(
+        # defaults to os.environ.get("OPENAI_API_KEY")
+        api_key=openai_api_key,
+        base_url=openai_api_base,
+    )
+
+    models = client.models.list()
+    model = models.data[0].id
+
+    responses = client.embeddings.create(
+        # ruff: noqa: E501
+        input=[
+            "Hello my name is",
+            "The best thing about vLLM is that it supports many different models",
+        ],
+        model=model,
+    )
+
+    for data in responses.data:
+        print(data.embedding)  # List of float of len 4096
+
+
+if __name__ == "__main__":
+    main()