# LlamaIndex Postprocessor Integration: Alibabacloud_Aisearch_Rerank
## Installation
```bash
pip install llama-index-postprocessor-alibabacloud-aisearch-rerank
```
## Usage
For further details, please visit [ranker-api-details](https://help.aliyun.com/zh/open-search/search-platform/developer-reference/ranker-api-details).
You can specify the `endpoint` and `aisearch_api_key` in the constructor, or set the environment variables `AISEARCH_ENDPOINT` and `AISEARCH_API_KEY`.
```python
from llama_index.core.data_structs import Node
from llama_index.core.schema import NodeWithScore
from llama_index.postprocessor.alibabacloud_aisearch_rerank import (
AlibabaCloudAISearchRerank,
)
nodes = [
NodeWithScore(
node=Node(id_="1", text="<text1>"),
score=0.7,
),
NodeWithScore(
node=Node(id_="2", text="<text2>"),
score=0.8,
),
NodeWithScore(
node=Node(id_="3", text="<text3>"),
score=0.1,
),
]
reranker = AlibabaCloudAISearchRerank(top_n=2)
new_nodes = reranker.postprocess_nodes(nodes, query_str="<query>")
for node in new_nodes:
print(f"{node.node.text[:20]}\t{node.score}")
```
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"description": "# LlamaIndex Postprocessor Integration: Alibabacloud_Aisearch_Rerank\n\n## Installation\n\n```bash\npip install llama-index-postprocessor-alibabacloud-aisearch-rerank\n```\n\n## Usage\n\nFor further details, please visit [ranker-api-details](https://help.aliyun.com/zh/open-search/search-platform/developer-reference/ranker-api-details).\n\nYou can specify the `endpoint` and `aisearch_api_key` in the constructor, or set the environment variables `AISEARCH_ENDPOINT` and `AISEARCH_API_KEY`.\n\n```python\nfrom llama_index.core.data_structs import Node\nfrom llama_index.core.schema import NodeWithScore\nfrom llama_index.postprocessor.alibabacloud_aisearch_rerank import (\n AlibabaCloudAISearchRerank,\n)\n\nnodes = [\n NodeWithScore(\n node=Node(id_=\"1\", text=\"<text1>\"),\n score=0.7,\n ),\n NodeWithScore(\n node=Node(id_=\"2\", text=\"<text2>\"),\n score=0.8,\n ),\n NodeWithScore(\n node=Node(id_=\"3\", text=\"<text3>\"),\n score=0.1,\n ),\n]\nreranker = AlibabaCloudAISearchRerank(top_n=2)\nnew_nodes = reranker.postprocess_nodes(nodes, query_str=\"<query>\")\nfor node in new_nodes:\n print(f\"{node.node.text[:20]}\\t{node.score}\")\n```\n",
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