Update app.py

app.py

@@ -32,8 +32,11 @@ from langchain.pydantic_v1 import BaseModel, Field, validator
 from langchain.output_parsers import PydanticOutputParser
 from langchain_community.llms import HuggingFaceHub
 from langchain_community.document_loaders import WebBaseLoader
-
-from pydantic import BaseModel
+from typing import List
+from langchain.llms import OpenAI
+from langchain.output_parsers import PydanticOutputParser
+from langchain.prompts import PromptTemplate
+from pydantic import BaseModel, Field
 import shutil
 
 title= "Green Greta"
@@ -111,9 +114,6 @@ class Answer(BaseModel):
 # Set up a PydanticOutputParser
 parser = PydanticOutputParser(pydantic_object=Answer)
 
-
-parser = PydanticOutputParser(pydantic_object=Answer)
-
 # Create a prompt with format instructions
 prompt = PromptTemplate(
     template="Answer the user query.\n{format_instructions}\n{query}\n",