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import chromadb
from sentence_transformers import CrossEncoder, SentenceTransformer
import json
def chroma_client_setup():
print("Setup client")
chroma_client = chromadb.Client()
collection = chroma_client.create_collection(
name="food_collection",
metadata={"hnsw:space": "cosine"} # l2 is the default
)
return collection
def load_data():
print("load data")
with open("test_json.json", "r") as f:
data = json.load(f)
return data
def embedding_function(items_to_embed: list[str]):
print("embedding")
sentence_model = SentenceTransformer(
"mixedbread-ai/mxbai-embed-large-v1"
)
embedded_items = sentence_model.encode(
items_to_embed
)
print(len(embedded_items))
print(type(embedded_items[0]))
print(type(embedded_items[0][0]))
embedded_list = [item.tolist() for item in embedded_items]
print(len(embedded_list))
print(type(embedded_list[0]))
print(type(embedded_list[0][0]))
return embedded_list
def chroma_upserting(collection, payload:list[dict]):
print('upserting')
print("printing item:")
embedding = embedding_function([item['doc'] for item in payload])
print(type(embedding))
collection.add(
documents=[item['doc'] for item in payload],
embeddings=embedding,
#metadatas=item,
ids=[f"id_{idx}" for idx, _ in enumerate(payload)]
)
def search_chroma(collection, query:str):
results = collection.query(
query_embeddings=embedding_function([query]),
n_results=5
)
return results
def reranking_results(query: str, top_k_results: list[str]):
# Load the model, here we use our base sized model
rerank_model = CrossEncoder("mixedbread-ai/mxbai-rerank-xsmall-v1")
reranked_results = rerank_model.rank(query, top_k_results, return_documents=True)
return reranked_results
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