Add huggingface model support

README.md

@@ -59,8 +59,8 @@ print(rag.query("What are the top themes in this story?", param=QueryParam(mode=
 # Perform global search
 print(rag.query("What are the top themes in this story?", param=QueryParam(mode="global")))
 
-# Perform hybird search
-print(rag.query("What are the top themes in this story?", param=QueryParam(mode="hybird")))
+# Perform hybrid search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="hybrid")))
 ```
 Batch Insert
 ```python
@@ -287,8 +287,8 @@ def extract_queries(file_path):
 ├── examples
 │   ├── batch_eval.py
 │   ├── generate_query.py
-│   ├── insert.py
-│   └── query.py
+│   ├── lightrag_openai_demo.py
+│   └── lightrag_hf_demo.py
 ├── lightrag
 │   ├── __init__.py
 │   ├── base.py

examples/insert.py

@@ -1,18 +0,0 @@
-import os
-import sys
-
-from lightrag import LightRAG
-
-# os.environ["OPENAI_API_KEY"] = ""
-
-WORKING_DIR = ""
-
-if not os.path.exists(WORKING_DIR):
-    os.mkdir(WORKING_DIR)
-
-rag = LightRAG(working_dir=WORKING_DIR)
-
-with open('./text.txt', 'r') as f:
-    text = f.read()
-
-rag.insert(text)

examples/lightrag_hf_demo.py

@@ -0,0 +1,36 @@
+import os
+import sys
+
+from lightrag import LightRAG, QueryParam
+from lightrag.llm import hf_model_complete, hf_embedding
+from transformers import AutoModel,AutoTokenizer
+
+WORKING_DIR = "./dickens"
+
+if not os.path.exists(WORKING_DIR):
+    os.mkdir(WORKING_DIR)
+
+rag = LightRAG(
+    working_dir=WORKING_DIR,
+    llm_model_func=hf_model_complete,  
+    llm_model_name='meta-llama/Llama-3.1-8B-Instruct',
+    embedding_func=hf_embedding,  
+    tokenizer=AutoTokenizer.from_pretrained("sentence-transformers/all-MiniLM-L6-v2"),
+    embed_model=AutoModel.from_pretrained("sentence-transformers/all-MiniLM-L6-v2")
+)
+
+
+with open("./book.txt") as f:
+    rag.insert(f.read())
+
+# Perform naive search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="naive")))
+
+# Perform local search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="local")))
+
+# Perform global search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="global")))
+
+# Perform hybrid search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="hybrid")))

examples/lightrag_openai_demo.py

@@ -0,0 +1,33 @@
+import os
+import sys
+
+from lightrag import LightRAG, QueryParam
+from lightrag.llm import gpt_4o_mini_complete, gpt_4o_complete
+from transformers import AutoModel,AutoTokenizer
+
+WORKING_DIR = "./dickens"
+
+if not os.path.exists(WORKING_DIR):
+    os.mkdir(WORKING_DIR)
+
+rag = LightRAG(
+    working_dir=WORKING_DIR,
+    llm_model_func=gpt_4o_complete
+    # llm_model_func=gpt_4o_mini_complete
+)
+
+
+with open("./book.txt") as f:
+    rag.insert(f.read())
+
+# Perform naive search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="naive")))
+
+# Perform local search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="local")))
+
+# Perform global search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="global")))
+
+# Perform hybrid search
+print(rag.query("What are the top themes in this story?", param=QueryParam(mode="hybrid")))

examples/query.py

@@ -1,16 +0,0 @@
-import os
-import sys
-
-from lightrag import LightRAG, QueryParam
-
-# os.environ["OPENAI_API_KEY"] = ""
-
-WORKING_DIR = ""
-
-rag = LightRAG(working_dir=WORKING_DIR)
-
-mode = 'global'
-query_param = QueryParam(mode=mode)
-
-result = rag.query("", param=query_param)
-print(result)

lightrag/__init__.py

@@ -1,5 +1,5 @@
 from .lightrag import LightRAG, QueryParam
 
-__version__ = "0.0.3"
+__version__ = "0.0.4"
 __author__ = "Zirui Guo"
 __url__ = "https://github.com/HKUDS/LightRAG"

lightrag/base.py

@@ -14,7 +14,7 @@ T = TypeVar("T")
 
 @dataclass
 class QueryParam:
-    mode: Literal["local", "global", "hybird", "naive"] = "global"
+    mode: Literal["local", "global", "hybrid", "naive"] = "global"
     only_need_context: bool = False
     response_type: str = "Multiple Paragraphs"
     top_k: int = 60

lightrag/lightrag.py

@@ -3,7 +3,8 @@ import os
 from dataclasses import asdict, dataclass, field
 from datetime import datetime
 from functools import partial
-from typing import Type, cast
+from typing import Type, cast, Any
+from transformers import AutoModel,AutoTokenizer, AutoModelForCausalLM
 
 from .llm import gpt_4o_complete, gpt_4o_mini_complete, openai_embedding,hf_model_complete,hf_embedding
 from .operate import (
@@ -11,7 +12,7 @@ from .operate import (
     extract_entities,
     local_query,
     global_query,
-    hybird_query,
+    hybrid_query,
     naive_query,
 )
 
@@ -38,15 +39,14 @@ from .base import (
 
 def always_get_an_event_loop() -> asyncio.AbstractEventLoop:
     try:
-        # If there is already an event loop, use it.
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
     except RuntimeError:
-        # If in a sub-thread, create a new event loop.
         logger.info("Creating a new event loop in a sub-thread.")
         loop = asyncio.new_event_loop()
         asyncio.set_event_loop(loop)
     return loop
 
+
 @dataclass
 class LightRAG:
     working_dir: str = field(
@@ -77,6 +77,9 @@ class LightRAG:
     )
 
     # text embedding
+    tokenizer: Any = None
+    embed_model: Any = None
+
     # embedding_func: EmbeddingFunc = field(default_factory=lambda:hf_embedding)
     embedding_func: EmbeddingFunc = field(default_factory=lambda:openai_embedding)# 
     embedding_batch_num: int = 32
@@ -100,6 +103,13 @@ class LightRAG:
     convert_response_to_json_func: callable = convert_response_to_json
 
     def __post_init__(self):        
+        if callable(self.embedding_func) and self.embedding_func.__name__ == 'hf_embedding':
+            if self.tokenizer is None:
+                self.tokenizer = AutoTokenizer.from_pretrained("sentence-transformers/all-MiniLM-L6-v2")
+            if self.embed_model is None:
+                self.embed_model = AutoModel.from_pretrained("sentence-transformers/all-MiniLM-L6-v2")
+
+
         log_file = os.path.join(self.working_dir, "lightrag.log")
         set_logger(log_file)
         logger.info(f"Logger initialized for working directory: {self.working_dir}")
@@ -130,8 +140,11 @@ class LightRAG:
             namespace="chunk_entity_relation", global_config=asdict(self)
         )
         self.embedding_func = limit_async_func_call(self.embedding_func_max_async)(
-            self.embedding_func
+            lambda texts: self.embedding_func(texts, self.tokenizer, self.embed_model) 
+            if callable(self.embedding_func) and self.embedding_func.__name__ == 'hf_embedding'
+            else self.embedding_func(texts)
         )
+
         self.entities_vdb = (
             self.vector_db_storage_cls(
                 namespace="entities",
@@ -267,8 +280,8 @@ class LightRAG:
                 param,
                 asdict(self),
             )
-        elif param.mode == "hybird":
-            response = await hybird_query(
+        elif param.mode == "hybrid":
+            response = await hybrid_query(
                 query,
                 self.chunk_entity_relation_graph,
                 self.entities_vdb,

lightrag/llm.py

@@ -142,18 +142,14 @@ async def openai_embedding(texts: list[str]) -> np.ndarray:
 
 
 
-global EMBED_MODEL
-global tokenizer
-EMBED_MODEL = AutoModel.from_pretrained("sentence-transformers/all-MiniLM-L6-v2")
-tokenizer = AutoTokenizer.from_pretrained("sentence-transformers/all-MiniLM-L6-v2")
 @wrap_embedding_func_with_attrs(
     embedding_dim=384,
     max_token_size=5000,
 )
-async def hf_embedding(texts: list[str]) -> np.ndarray:
+async def hf_embedding(texts: list[str], tokenizer, embed_model) -> np.ndarray:
     input_ids = tokenizer(texts, return_tensors='pt', padding=True, truncation=True).input_ids
     with torch.no_grad():
-        outputs = EMBED_MODEL(input_ids)
+        outputs = embed_model(input_ids)
         embeddings = outputs.last_hidden_state.mean(dim=1)
     return embeddings.detach().numpy()
 

lightrag/operate.py

@@ -827,7 +827,7 @@ async def _find_related_text_unit_from_relationships(
 
     return all_text_units
 
-async def hybird_query(
+async def hybrid_query(
     query,
     knowledge_graph_inst: BaseGraphStorage,
     entities_vdb: BaseVectorStorage,

reproduce/Step_3.py

@@ -52,7 +52,7 @@ def run_queries_and_save_to_json(queries, rag_instance, query_param, output_file
 
 if __name__ == "__main__":
     cls = "agriculture"
-    mode = "hybird"
+    mode = "hybrid"
     WORKING_DIR = "../{cls}"
 
     rag = LightRAG(working_dir=WORKING_DIR)