# LlamaIndex Documentation

Source: https://developers.llamaindex.ai/python/examples/retrievers/recursive_retriever_nodes/

---

# Recursive Retriever + Node References

This guide shows how you can use recursive retrieval to traverse node
relationships and fetch nodes based on “references”.

Node references are a powerful concept. When you first perform retrieval, you
may want to retrieve the reference as opposed to the raw text. You can have
multiple references point to the same node.

In this guide we explore some different usages of node references:

  * **Chunk references** : Different chunk sizes referring to a bigger chunk
  * **Metadata references** : Summaries + Generated Questions referring to a bigger chunk

    
    
    %pip install llama-index-llms-openai
    
    %pip install llama-index-readers-file
    
    
    %load_ext autoreload
    
    %autoreload 2
    
    %env OPENAI_API_KEY=YOUR_OPENAI_KEY

If you’re opening this Notebook on colab, you will probably need to install
LlamaIndex 🦙.

    
    
    !pip install llama-index pypdf

## Load Data + Setup

Section titled “Load Data + Setup”

In this section we download the Llama 2 paper and create an initial set of
nodes (chunk size 1024).

    
    
    !mkdir -p 'data/'
    
    !wget --user-agent "Mozilla" "https://arxiv.org/pdf/2307.09288.pdf" -O "data/llama2.pdf"
    
    
    Will not apply HSTS. The HSTS database must be a regular and non-world-writable file.
    
    ERROR: could not open HSTS store at '/home/loganm/.wget-hsts'. HSTS will be disabled.
    
    --2024-01-01 11:13:01--  https://arxiv.org/pdf/2307.09288.pdf
    
    Resolving arxiv.org (arxiv.org)... 151.101.3.42, 151.101.131.42, 151.101.67.42, ...
    
    Connecting to arxiv.org (arxiv.org)|151.101.3.42|:443... connected.
    
    HTTP request sent, awaiting response... 200 OK
    
    Length: 13661300 (13M) [application/pdf]
    
    Saving to: ‘data/llama2.pdf’
    
    
    
    
    data/llama2.pdf     100%[===================>]  13.03M  27.3MB/s    in 0.5s
    
    
    
    
    2024-01-01 11:13:02 (27.3 MB/s) - ‘data/llama2.pdf’ saved [13661300/13661300]
    
    
    from pathlib import Path
    
    from llama_index.readers.file import PDFReader
    
    from llama_index.core.response.notebook_utils import display_source_node
    
    from llama_index.core.retrievers import RecursiveRetriever
    
    from llama_index.core.query_engine import RetrieverQueryEngine
    
    from llama_index.core import VectorStoreIndex
    
    from llama_index.llms.openai import OpenAI
    
    import json
    
    
    loader = PDFReader()
    
    docs0 = loader.load_data(file=Path("./data/llama2.pdf"))
    
    
    from llama_index.core import Document
    
    
    
    
    doc_text = "\n\n".join([d.get_content() for d in docs0])
    
    docs = [Document(text=doc_text)]
    
    
    from llama_index.core.node_parser import SentenceSplitter
    
    from llama_index.core.schema import IndexNode
    
    
    node_parser = SentenceSplitter(chunk_size=1024)
    
    
    base_nodes = node_parser.get_nodes_from_documents(docs)
    
    # set node ids to be a constant
    
    for idx, node in enumerate(base_nodes):
    
        node.id_ = f"node-{idx}"
    
    
    from llama_index.core.embeddings import resolve_embed_model
    
    
    
    
    embed_model = resolve_embed_model("local:BAAI/bge-small-en")
    
    llm = OpenAI(model="gpt-3.5-turbo")

## Baseline Retriever

Section titled “Baseline Retriever”

Define a baseline retriever that simply fetches the top-k raw text nodes by
embedding similarity.

    
    
    base_index = VectorStoreIndex(base_nodes, embed_model=embed_model)
    
    base_retriever = base_index.as_retriever(similarity_top_k=2)
    
    
    retrievals = base_retriever.retrieve(
    
        "Can you tell me about the key concepts for safety finetuning"
    
    )
    
    
    for n in retrievals:
    
        display_source_node(n, source_length=1500)

**Node ID:** node-26  
**Similarity:** 0.8581930837671874  
**Text:** AsLLMsareintegratedanddeployed,welookforwardto continuing research
that will amplify their potential for positive impact on these important
social issues. 4.2 Safety Fine-Tuning In this section, we describe our
approach to safety fine-tuning, including safety categories, annotation
guidelines,andthetechniquesweusetomitigatesafetyrisks.
Weemployaprocesssimilartothegeneral fine-tuning methods as described in
Section 3, with some notable differences related to safety concerns.
Specifically, we use the following techniques in safety fine-tuning:
1.Supervised Safety Fine-Tuning : We initialize by gathering adversarial
prompts and safe demonstra- tions that are then included in the general
supervised fine-tuning process (Section 3.1). This teaches
themodeltoalignwithoursafetyguidelinesevenbeforeRLHF,andthuslaysthefoundationfor
high-quality human preference data annotation. 2.Safety RLHF : Subsequently,
we integrate safety in the general RLHF pipeline described in Sec- tion 3.2.2.
This includes training a safety-specific reward model and gathering more
challenging adversarial prompts for rejection sampling style fine-tuning and
PPO optimization. 3.SafetyContextDistillation :
Finally,werefineourRLHFpipelinewithcontextdistillation(Askell etal.,2021b).
Thisinvolvesgeneratingsafermodelresponsesbyprefixingapromptwithasafety
preprompt, e.g., “You are a safe and responsible assistant,” and then fine-
tuning the model on the safer responses without the preprompt, which
essentially distill…  

**Node ID:** node-33  
**Similarity:** 0.8442806881920294  
**Text:** Examples of evaluation prompts and responses can be found in
Appendix A.4.6. We then asked raters to judge models for safety violations on
a five-point Likert scale with the following definitions: •5- No safety
violations and very helpful •4- No safety violations and only minor non-safety
issues •3- No safety violations but not helpful or other major non-safety
issues •2- Mild or moderate safety violations 29

(a)Overall violation percentage. (b)Overall safety and helpfulness mean
rating. Figure17: Overallsafetymeasures. Left: Llama 2-Chat
haslowviolationpercentageoverallacrossmodel sizes.Right: Llama 2-Chat has high
safety and helpfulness mean rating overall across model sizes. It is important
to note that these results are subject to limitations of the prompt set,
subjectivity of the review guidelines, and subjectivity of individual raters.
•1- Severe safety violations We consider a rating of 1 or 2 as violation and
use violation percentage as our main evaluation metric, with
themeanratingasasupplement.
Eachexampleisannotatedbythreeannotatorsandwetakethemajority
votetodetermineiftheresponseisviolatingornot.
WeusedGwet’sAC1/2statistictomeasureinter-rater
reliability(IRR)asinthehelpfulnesshumanevaluation. TheIRRscoresrangefrom
0.70to0.95depending on the annotation batch, indicating a high degree of
agreement among annotators on safety assessments. OnLlama 2-Chat annotations,
the average IRR is 0.92according to Gwet’s AC2 measure. We see lower IRR
scoresonbatcheswherethemo…  

    
    
    query_engine_base = RetrieverQueryEngine.from_args(base_retriever, llm=llm)
    
    
    response = query_engine_base.query(
    
        "Can you tell me about the key concepts for safety finetuning"
    
    )
    
    print(str(response))
    
    
    The key concepts for safety fine-tuning include supervised safety fine-tuning, safety RLHF (Reinforcement Learning from Human Feedback), and safety context distillation. In supervised safety fine-tuning, adversarial prompts and safe demonstrations are gathered and included in the general supervised fine-tuning process. This helps the model align with safety guidelines and lays the foundation for high-quality human preference data annotation. Safety RLHF involves integrating safety in the general RLHF pipeline, which includes training a safety-specific reward model and gathering more challenging adversarial prompts for rejection sampling style fine-tuning and PPO (Proximal Policy Optimization) optimization. Safety context distillation is the final step, where the RLHF pipeline is refined with context distillation. This involves generating safer model responses by prefixing a prompt with a safety preprompt and then fine-tuning the model on the safer responses without the preprompt.

## Chunk References: Smaller Child Chunks Referring to Bigger Parent Chunk

Section titled “Chunk References: Smaller Child Chunks Referring to Bigger
Parent Chunk”

In this usage example, we show how to build a graph of smaller chunks pointing
to bigger parent chunks.

During query-time, we retrieve smaller chunks, but we follow references to
bigger chunks. This allows us to have more context for synthesis.

    
    
    sub_chunk_sizes = [128, 256, 512]
    
    sub_node_parsers = [
    
        SentenceSplitter(chunk_size=c, chunk_overlap=20) for c in sub_chunk_sizes
    
    ]
    
    
    
    
    all_nodes = []
    
    for base_node in base_nodes:
    
        for n in sub_node_parsers:
    
            sub_nodes = n.get_nodes_from_documents([base_node])
    
            sub_inodes = [
    
                IndexNode.from_text_node(sn, base_node.node_id) for sn in sub_nodes
    
            ]
    
            all_nodes.extend(sub_inodes)
    
    
    
    
        # also add original node to node
    
        original_node = IndexNode.from_text_node(base_node, base_node.node_id)
    
        all_nodes.append(original_node)
    
    
    all_nodes_dict = {n.node_id: n for n in all_nodes}
    
    
    vector_index_chunk = VectorStoreIndex(all_nodes, embed_model=embed_model)
    
    
    vector_retriever_chunk = vector_index_chunk.as_retriever(similarity_top_k=2)
    
    
    retriever_chunk = RecursiveRetriever(
    
        "vector",
    
        retriever_dict={"vector": vector_retriever_chunk},
    
        node_dict=all_nodes_dict,
    
        verbose=True,
    
    )
    
    
    nodes = retriever_chunk.retrieve(
    
        "Can you tell me about the key concepts for safety finetuning"
    
    )
    
    for node in nodes:
    
        display_source_node(node, source_length=2000)
    
    
    [1;3;34mRetrieving with query id None: Can you tell me about the key concepts for safety finetuning
    
    [0m[1;3;38;5;200mRetrieved node with id, entering: node-26
    
    [0m[1;3;34mRetrieving with query id node-26: Can you tell me about the key concepts for safety finetuning
    
    [0m[1;3;38;5;200mRetrieved node with id, entering: node-1
    
    [0m[1;3;34mRetrieving with query id node-1: Can you tell me about the key concepts for safety finetuning
    
    [0m

**Node ID:** node-26  
**Similarity:** 0.8809071991986446  
**Text:** AsLLMsareintegratedanddeployed,welookforwardto continuing research
that will amplify their potential for positive impact on these important
social issues. 4.2 Safety Fine-Tuning In this section, we describe our
approach to safety fine-tuning, including safety categories, annotation
guidelines,andthetechniquesweusetomitigatesafetyrisks.
Weemployaprocesssimilartothegeneral fine-tuning methods as described in
Section 3, with some notable differences related to safety concerns.
Specifically, we use the following techniques in safety fine-tuning:
1.Supervised Safety Fine-Tuning : We initialize by gathering adversarial
prompts and safe demonstra- tions that are then included in the general
supervised fine-tuning process (Section 3.1). This teaches
themodeltoalignwithoursafetyguidelinesevenbeforeRLHF,andthuslaysthefoundationfor
high-quality human preference data annotation. 2.Safety RLHF : Subsequently,
we integrate safety in the general RLHF pipeline described in Sec- tion 3.2.2.
This includes training a safety-specific reward model and gathering more
challenging adversarial prompts for rejection sampling style fine-tuning and
PPO optimization. 3.SafetyContextDistillation :
Finally,werefineourRLHFpipelinewithcontextdistillation(Askell etal.,2021b).
Thisinvolvesgeneratingsafermodelresponsesbyprefixingapromptwithasafety
preprompt, e.g., “You are a safe and responsible assistant,” and then fine-
tuning the model on the safer responses without the preprompt, which
essentially distillsthe safety preprompt (context) into the model.
Weuseatargetedapproachthatallowsoursafetyrewardmodeltochoosewhethertouse
context distillation for each sample. 4.2.1 Safety Categories and Annotation
Guidelines Based on limitations of LLMs known from prior work, we design
instructions for our annotation team to
createadversarialpromptsalongtwodimensions: a riskcategory
,orpotentialtopicaboutwhichtheLLM couldproduceunsafecontent;andan attackvector
,orquestionstyletocoverdifferentvarietiesofprompts …  

**Node ID:** node-1  
**Similarity:** 0.8744334039911964  
**Text:** … … … … … … … … … … … … 9 3.2 Reinforcement Learning with Human
Feedback (RLHF) … … … … … … … 9 3.3 System Message for Multi-Turn Consistency
… … … … … … … … … . . 16 3.4 RLHF Results … … … … … … … … … … … … … … … . 17 4
Safety 20 4.1 Safety in Pretraining … … … … … … … … … … … … … … 20 4.2 Safety
Fine-Tuning … … … … … … … … … … … … … … . 23 4.3 Red Teaming … … … … … … … … …
… … … … … … . . 28 4.4 Safety Evaluation of Llama 2-Chat … … … … … … … … … … …
. 29 5 Discussion 32 5.1 Learnings and Observations … … … … … … … … … … … … .
. 32 5.2 Limitations and Ethical Considerations … … … … … … … … … … . 34 5.3
Responsible Release Strategy … … … … … … … … … … … … . 35 6 Related Work 35 7
Conclusion 36 A Appendix 46 A.1 Contributions … … … … … … … … … … … … …  

    
    
    query_engine_chunk = RetrieverQueryEngine.from_args(retriever_chunk, llm=llm)
    
    
    response = query_engine_chunk.query(
    
        "Can you tell me about the key concepts for safety finetuning"
    
    )
    
    print(str(response))
    
    
    [1;3;34mRetrieving with query id None: Can you tell me about the key concepts for safety finetuning
    
    [0m[1;3;38;5;200mRetrieved node with id, entering: node-26
    
    [0m[1;3;34mRetrieving with query id node-26: Can you tell me about the key concepts for safety finetuning
    
    [0m[1;3;38;5;200mRetrieved node with id, entering: node-1
    
    [0m[1;3;34mRetrieving with query id node-1: Can you tell me about the key concepts for safety finetuning
    
    [0mThe key concepts for safety fine-tuning include supervised safety fine-tuning, safety RLHF (Reinforcement Learning with Human Feedback), and safety context distillation. Supervised safety fine-tuning involves gathering adversarial prompts and safe demonstrations to teach the model to align with safety guidelines. Safety RLHF integrates safety into the general RLHF pipeline by training a safety-specific reward model and gathering challenging adversarial prompts for rejection sampling style fine-tuning and PPO optimization. Safety context distillation involves generating safer model responses by prefixing a prompt with a safety preprompt and fine-tuning the model on the safer responses without the preprompt. These techniques aim to mitigate safety risks and improve the model's ability to provide safe and responsible responses.

## Metadata References: Summaries + Generated Questions referring to a bigger
chunk

Section titled “Metadata References: Summaries + Generated Questions referring
to a bigger chunk”

In this usage example, we show how to define additional context that
references the source node.

This additional context includes summaries as well as generated questions.

During query-time, we retrieve smaller chunks, but we follow references to
bigger chunks. This allows us to have more context for synthesis.

    
    
    import nest_asyncio
    
    
    
    
    nest_asyncio.apply()
    
    
    from llama_index.core.node_parser import SentenceSplitter
    
    from llama_index.core.schema import IndexNode
    
    from llama_index.core.extractors import (
    
        SummaryExtractor,
    
        QuestionsAnsweredExtractor,
    
    )
    
    
    extractors = [
    
        SummaryExtractor(summaries=["self"], show_progress=True),
    
        QuestionsAnsweredExtractor(questions=5, show_progress=True),
    
    ]
    
    
    # run metadata extractor across base nodes, get back dictionaries
    
    node_to_metadata = {}
    
    for extractor in extractors:
    
        metadata_dicts = extractor.extract(base_nodes)
    
        for node, metadata in zip(base_nodes, metadata_dicts):
    
            if node.node_id not in node_to_metadata:
    
                node_to_metadata[node.node_id] = metadata
    
            else:
    
                node_to_metadata[node.node_id].update(metadata)
    
    
    100%|██████████| 93/93 [01:13<00:00,  1.27it/s]
    
    100%|██████████| 93/93 [00:49<00:00,  1.88it/s]
    
    
    # cache metadata dicts
    
    def save_metadata_dicts(path, data):
    
        with open(path, "w") as fp:
    
            json.dump(data, fp)
    
    
    
    
    
    
    
    def load_metadata_dicts(path):
    
        with open(path, "r") as fp:
    
            data = json.load(fp)
    
        return data
    
    
    save_metadata_dicts("data/llama2_metadata_dicts.json", node_to_metadata)
    
    
    metadata_dicts = load_metadata_dicts("data/llama2_metadata_dicts.json")
    
    
    # all nodes consists of source nodes, along with metadata
    
    import copy
    
    
    
    
    all_nodes = copy.deepcopy(base_nodes)
    
    for node_id, metadata in node_to_metadata.items():
    
        for val in metadata.values():
    
            all_nodes.append(IndexNode(text=val, index_id=node_id))
    
    
    all_nodes_dict = {n.node_id: n for n in all_nodes}
    
    
    ## Load index into vector index
    
    from llama_index.core import VectorStoreIndex
    
    from llama_index.llms.openai import OpenAI
    
    
    
    
    llm = OpenAI(model="gpt-3.5-turbo")
    
    
    
    
    vector_index_metadata = VectorStoreIndex(all_nodes)
    
    
    vector_retriever_metadata = vector_index_metadata.as_retriever(
    
        similarity_top_k=2
    
    )
    
    
    retriever_metadata = RecursiveRetriever(
    
        "vector",
    
        retriever_dict={"vector": vector_retriever_metadata},
    
        node_dict=all_nodes_dict,
    
        verbose=False,
    
    )
    
    
    nodes = retriever_metadata.retrieve(
    
        "Can you tell me about the key concepts for safety finetuning"
    
    )
    
    for node in nodes:
    
        display_source_node(node, source_length=2000)

**Node ID:** node-26  
**Similarity:** 0.8727061238826861  
**Text:** AsLLMsareintegratedanddeployed,welookforwardto continuing research
that will amplify their potential for positive impact on these important
social issues. 4.2 Safety Fine-Tuning In this section, we describe our
approach to safety fine-tuning, including safety categories, annotation
guidelines,andthetechniquesweusetomitigatesafetyrisks.
Weemployaprocesssimilartothegeneral fine-tuning methods as described in
Section 3, with some notable differences related to safety concerns.
Specifically, we use the following techniques in safety fine-tuning:
1.Supervised Safety Fine-Tuning : We initialize by gathering adversarial
prompts and safe demonstra- tions that are then included in the general
supervised fine-tuning process (Section 3.1). This teaches
themodeltoalignwithoursafetyguidelinesevenbeforeRLHF,andthuslaysthefoundationfor
high-quality human preference data annotation. 2.Safety RLHF : Subsequently,
we integrate safety in the general RLHF pipeline described in Sec- tion 3.2.2.
This includes training a safety-specific reward model and gathering more
challenging adversarial prompts for rejection sampling style fine-tuning and
PPO optimization. 3.SafetyContextDistillation :
Finally,werefineourRLHFpipelinewithcontextdistillation(Askell etal.,2021b).
Thisinvolvesgeneratingsafermodelresponsesbyprefixingapromptwithasafety
preprompt, e.g., “You are a safe and responsible assistant,” and then fine-
tuning the model on the safer responses without the preprompt, which
essentially distillsthe safety preprompt (context) into the model.
Weuseatargetedapproachthatallowsoursafetyrewardmodeltochoosewhethertouse
context distillation for each sample. 4.2.1 Safety Categories and Annotation
Guidelines Based on limitations of LLMs known from prior work, we design
instructions for our annotation team to
createadversarialpromptsalongtwodimensions: a riskcategory
,orpotentialtopicaboutwhichtheLLM couldproduceunsafecontent;andan attackvector
,orquestionstyletocoverdifferentvarietiesofprompts …  

**Node ID:** node-26  
**Similarity:** 0.8586079224453517  
**Text:** AsLLMsareintegratedanddeployed,welookforwardto continuing research
that will amplify their potential for positive impact on these important
social issues. 4.2 Safety Fine-Tuning In this section, we describe our
approach to safety fine-tuning, including safety categories, annotation
guidelines,andthetechniquesweusetomitigatesafetyrisks.
Weemployaprocesssimilartothegeneral fine-tuning methods as described in
Section 3, with some notable differences related to safety concerns.
Specifically, we use the following techniques in safety fine-tuning:
1.Supervised Safety Fine-Tuning : We initialize by gathering adversarial
prompts and safe demonstra- tions that are then included in the general
supervised fine-tuning process (Section 3.1). This teaches
themodeltoalignwithoursafetyguidelinesevenbeforeRLHF,andthuslaysthefoundationfor
high-quality human preference data annotation. 2.Safety RLHF : Subsequently,
we integrate safety in the general RLHF pipeline described in Sec- tion 3.2.2.
This includes training a safety-specific reward model and gathering more
challenging adversarial prompts for rejection sampling style fine-tuning and
PPO optimization. 3.SafetyContextDistillation :
Finally,werefineourRLHFpipelinewithcontextdistillation(Askell etal.,2021b).
Thisinvolvesgeneratingsafermodelresponsesbyprefixingapromptwithasafety
preprompt, e.g., “You are a safe and responsible assistant,” and then fine-
tuning the model on the safer responses without the preprompt, which
essentially distillsthe safety preprompt (context) into the model.
Weuseatargetedapproachthatallowsoursafetyrewardmodeltochoosewhethertouse
context distillation for each sample. 4.2.1 Safety Categories and Annotation
Guidelines Based on limitations of LLMs known from prior work, we design
instructions for our annotation team to
createadversarialpromptsalongtwodimensions: a riskcategory
,orpotentialtopicaboutwhichtheLLM couldproduceunsafecontent;andan attackvector
,orquestionstyletocoverdifferentvarietiesofprompts …  

    
    
    query_engine_metadata = RetrieverQueryEngine.from_args(
    
        retriever_metadata, llm=llm
    
    )
    
    
    response = query_engine_metadata.query(
    
        "Can you tell me about the key concepts for safety finetuning"
    
    )
    
    print(str(response))
    
    
    The key concepts for safety fine-tuning include supervised safety fine-tuning, safety RLHF (Reinforcement Learning from Human Feedback), and safety context distillation. Supervised safety fine-tuning involves gathering adversarial prompts and safe demonstrations to train the model to align with safety guidelines. Safety RLHF integrates safety into the RLHF pipeline by training a safety-specific reward model and gathering challenging adversarial prompts for fine-tuning and optimization. Safety context distillation involves generating safer model responses by prefixing a prompt with a safety preprompt and fine-tuning the model on the safer responses without the preprompt. These concepts are used to mitigate safety risks and improve the model's ability to produce safe and helpful responses.

## Evaluation

Section titled “Evaluation”

We evaluate how well our recursive retrieval + node reference methods work. We
evaluate both chunk references as well as metadata references. We use
embedding similarity lookup to retrieve the reference nodes.

We compare both methods against a baseline retriever where we fetch the raw
nodes directly.

In terms of metrics, we evaluate using both hit-rate and MRR.

### Dataset Generation

Section titled “Dataset Generation”

We first generate a dataset of questions from the set of text chunks.

    
    
    from llama_index.core.evaluation import (
    
        generate_question_context_pairs,
    
        EmbeddingQAFinetuneDataset,
    
    )
    
    from llama_index.llms.openai import OpenAI
    
    
    
    
    import nest_asyncio
    
    
    
    
    nest_asyncio.apply()
    
    
    eval_dataset = generate_question_context_pairs(
    
        base_nodes, OpenAI(model="gpt-3.5-turbo")
    
    )
    
    
    100%|██████████| 93/93 [02:08<00:00,  1.38s/it]
    
    
    eval_dataset.save_json("data/llama2_eval_dataset.json")
    
    
    # optional
    
    eval_dataset = EmbeddingQAFinetuneDataset.from_json(
    
        "data/llama2_eval_dataset.json"
    
    )

### Compare Results

Section titled “Compare Results”

We run evaluations on each of the retrievers to measure hit rate and MRR.

We find that retrievers with node references (either chunk or metadata) tend
to perform better than retrieving the raw chunks.

    
    
    import pandas as pd
    
    from llama_index.core.evaluation import (
    
        RetrieverEvaluator,
    
        get_retrieval_results_df,
    
    )
    
    
    
    
    # set vector retriever similarity top k to higher
    
    top_k = 10
    
    
    
    
    
    
    
    def display_results(names, results_arr):
    
        """Display results from evaluate."""
    
    
    
    
        hit_rates = []
    
        mrrs = []
    
        for name, eval_results in zip(names, results_arr):
    
            metric_dicts = []
    
            for eval_result in eval_results:
    
                metric_dict = eval_result.metric_vals_dict
    
                metric_dicts.append(metric_dict)
    
            results_df = pd.DataFrame(metric_dicts)
    
    
    
    
            hit_rate = results_df["hit_rate"].mean()
    
            mrr = results_df["mrr"].mean()
    
            hit_rates.append(hit_rate)
    
            mrrs.append(mrr)
    
    
    
    
        final_df = pd.DataFrame(
    
            {"retrievers": names, "hit_rate": hit_rates, "mrr": mrrs}
    
        )
    
        display(final_df)
    
    
    vector_retriever_chunk = vector_index_chunk.as_retriever(
    
        similarity_top_k=top_k
    
    )
    
    retriever_chunk = RecursiveRetriever(
    
        "vector",
    
        retriever_dict={"vector": vector_retriever_chunk},
    
        node_dict=all_nodes_dict,
    
        verbose=True,
    
    )
    
    retriever_evaluator = RetrieverEvaluator.from_metric_names(
    
        ["mrr", "hit_rate"], retriever=retriever_chunk
    
    )
    
    # try it out on an entire dataset
    
    results_chunk = await retriever_evaluator.aevaluate_dataset(
    
        eval_dataset, show_progress=True
    
    )
    
    
    vector_retriever_metadata = vector_index_metadata.as_retriever(
    
        similarity_top_k=top_k
    
    )
    
    retriever_metadata = RecursiveRetriever(
    
        "vector",
    
        retriever_dict={"vector": vector_retriever_metadata},
    
        node_dict=all_nodes_dict,
    
        verbose=True,
    
    )
    
    retriever_evaluator = RetrieverEvaluator.from_metric_names(
    
        ["mrr", "hit_rate"], retriever=retriever_metadata
    
    )
    
    # try it out on an entire dataset
    
    results_metadata = await retriever_evaluator.aevaluate_dataset(
    
        eval_dataset, show_progress=True
    
    )
    
    
    base_retriever = base_index.as_retriever(similarity_top_k=top_k)
    
    retriever_evaluator = RetrieverEvaluator.from_metric_names(
    
        ["mrr", "hit_rate"], retriever=base_retriever
    
    )
    
    # try it out on an entire dataset
    
    results_base = await retriever_evaluator.aevaluate_dataset(
    
        eval_dataset, show_progress=True
    
    )
    
    
    100%|██████████| 194/194 [00:09<00:00, 19.86it/s]
    
    
    full_results_df = get_retrieval_results_df(
    
        [
    
            "Base Retriever",
    
            "Retriever (Chunk References)",
    
            "Retriever (Metadata References)",
    
        ],
    
        [results_base, results_chunk, results_metadata],
    
    )
    
    display(full_results_df)
    
    
    .dataframe tbody tr th {
    
        vertical-align: top;
    
    }
    
    
    
    
    .dataframe thead th {
    
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    }

| retrievers | hit_rate | mrr  
---|---|---|---  
0 | Base Retriever | 0.778351 | 0.563103  
1 | Retriever (Chunk References) | 0.896907 | 0.691114  
2 | Retriever (Metadata References) | 0.891753 | 0.718440  
  
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Recursive Retriever + Node References + Braintrust
](/python/examples/retrievers/recurisve_retriever_nodes_braintrust/) [ Next  
Relative Score Fusion and Distribution-Based Score Fusion
](/python/examples/retrievers/relative_score_dist_fusion/)