改为简单链-3

app.py

@@ -19,6 +19,7 @@ from langchain.chains.combine_documents.refine import RefineDocumentsChain
 from langchain.chains.llm import LLMChain
 from langchain.chains.combine_documents import create_stuff_documents_chain
 from langchain.chains import StuffDocumentsChain
+from langchain_core.prompts import PromptTemplate
 
 chain: Optional[Callable] = None
 
@@ -80,10 +81,21 @@ def web_loader(file, openai_key, puzhiai_key, zilliz_uri, user, password):
     #   document_prompt=EXAMPLE_PROMPT,
     #)
 
+    document_prompt = PromptTemplate(
+        input_variables=["page_content"],
+        template="{page_content}"
+    )
+    document_variable_name = "context"
+    # The prompt here should take as an input variable the
+    # `document_variable_name`
+    prompt = PromptTemplate.from_template(
+        "Summarize this content: {context}"
+    )
+    llm_chain = LLMChain(llm=llm, prompt=prompt)
     combine_documents_chain = StuffDocumentsChain(
-        llm_chain=llm,
-        document_prompt=QUESTION_PROMPT,
-        document_variable_name="context"
+        llm_chain=llm_chain,
+        document_prompt=document_prompt,
+        document_variable_name=document_variable_name
     )
 
     chain = RetrievalQAWithSourcesChain(combine_documents_chain=combine_documents_chain,