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import streamlit as st
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from dotenv import load_dotenv
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from langchain.memory import ConversationBufferMemory
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from langchain.chains import ConversationalRetrievalChain
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from htmlTemplates import css, bot_template, user_template
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from langchain_text_splitters import CharacterTextSplitter, RecursiveCharacterTextSplitter
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from langchain_community.vectorstores import FAISS
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from langchain_community.embeddings import HuggingFaceEmbeddings
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from langchain_community.document_loaders.pdf import PyPDFLoader
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from langchain_community.document_loaders.text import TextLoader
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from langchain_community.document_loaders.csv_loader import CSVLoader
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from langchain_community.document_loaders.json_loader import JSONLoader
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import tempfile
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import os
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import json
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from langchain.docstore.document import Document
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from langchain_groq import ChatGroq
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def get_pdf_text(pdf_docs):
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temp_dir = tempfile.TemporaryDirectory()
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temp_filepath = os.path.join(temp_dir.name, pdf_docs.name)
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with open(temp_filepath, "wb") as f:
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f.write(pdf_docs.getvalue())
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pdf_loader = PyPDFLoader(temp_filepath)
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pdf_doc = pdf_loader.load()
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return pdf_doc
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def get_text_file(docs):
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temp_dir = tempfile.TemporaryDirectory()
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temp_filepath = os.path.join(temp_dir.name, docs.name)
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with open(temp_filepath, "wb") as f:
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f.write(docs.getvalue())
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docs_loader = TextLoader(temp_filepath)
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text_doc = docs_loader.load()
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return text_doc
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def get_csv_file(docs):
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temp_dir = tempfile.TemporaryDirectory()
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temp_filepath = os.path.join(temp_dir.name, docs.name)
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with open(temp_filepath, "wb") as f:
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f.write(docs.getvalue())
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csv_loader = CSVLoader(temp_filepath)
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csv_doc = csv_loader.load()
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return csv_doc
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def get_json_file(file) -> list[Document]:
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raw = file.getvalue().decode("utf-8", errors="ignore")
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data = json.loads(raw)
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docs = []
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def add_doc(x):
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docs.append(Document(page_content=json.dumps(x, ensure_ascii=False)))
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if isinstance(data, dict) and "scans" in data and isinstance(data["scans"], list):
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for s in data["scans"]:
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rels = s.get("relationships", [])
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if isinstance(rels, list) and rels:
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for r in rels:
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add_doc(r)
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if not docs:
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add_doc(data)
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elif isinstance(data, list):
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for item in data:
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add_doc(item)
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else:
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add_doc(data)
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return docs
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def get_text_chunks(documents):
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text_splitter = RecursiveCharacterTextSplitter(
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chunk_size=1000,
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chunk_overlap=200,
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length_function=len
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)
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documents = text_splitter.split_documents(documents)
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return documents
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def get_vectorstore(text_chunks):
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embeddings = HuggingFaceEmbeddings(model_name='sentence-transformers/all-MiniLM-L12-v2',
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model_kwargs={'device': 'cpu'})
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vectorstore = FAISS.from_documents(text_chunks, embeddings)
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return vectorstore
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def get_conversation_chain(vectorstore):
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llm = ChatGroq(
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groq_api_key=os.environ.get("GROQ_API_KEY"),
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model_name="llama-3.1-8b-instant",
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temperature=0.75,
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max_tokens=512
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)
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memory = ConversationBufferMemory(
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memory_key="chat_history",
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return_messages=True
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)
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retriever = vectorstore.as_retriever(search_kwargs={"k": 3})
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conversation_chain = ConversationalRetrievalChain.from_llm(
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llm=llm,
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retriever=retriever,
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memory=memory,
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)
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return conversation_chain
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def handle_userinput(user_question):
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print('user_question => ', user_question)
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response = st.session_state.conversation({'question': user_question})
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st.session_state.chat_history = response['chat_history']
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for i, message in enumerate(st.session_state.chat_history):
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if i % 2 == 0:
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st.write(user_template.replace(
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"{{MSG}}", message.content), unsafe_allow_html=True)
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else:
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st.write(bot_template.replace(
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"{{MSG}}", message.content), unsafe_allow_html=True)
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def main():
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load_dotenv()
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st.set_page_config(page_title="Basic_RAG_AI_Chatbot_with_Llama",
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page_icon=":books:")
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st.write(css, unsafe_allow_html=True)
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if "conversation" not in st.session_state:
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st.session_state.conversation = None
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if "chat_history" not in st.session_state:
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st.session_state.chat_history = None
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st.header("Basic_RAG_AI_Chatbot_with_Llama3 :books:")
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user_question = st.text_input("Ask a question about your documents:")
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if user_question:
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handle_userinput(user_question)
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with st.sidebar:
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st.subheader("Your documents")
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docs = st.file_uploader(
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"Upload your Files here and click on 'Process'", accept_multiple_files=True)
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if st.button("Process[PDF]"):
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with st.spinner("Processing"):
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doc_list = []
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for file in docs:
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print('file - type : ', file.type)
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if file.type in ['application/octet-stream', 'application/pdf']:
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doc_list.extend(get_pdf_text(file))
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else:
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st.error("PDF ํ์ผ์ด ์๋๋๋ค.")
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if not doc_list:
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st.error("์ฒ๋ฆฌ ๊ฐ๋ฅํ ๋ฌธ์๋ฅผ ์ฐพ์ง ๋ชปํ์ต๋๋ค.")
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st.stop()
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text_chunks = get_text_chunks(doc_list)
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vectorstore = get_vectorstore(text_chunks)
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st.session_state.conversation = get_conversation_chain(vectorstore)
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if st.button("Process[TXT]"):
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with st.spinner("Processing"):
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doc_list = []
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for file in docs:
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print('file - type : ', file.type)
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if file.type == 'text/plain':
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doc_list.extend(get_text_file(file))
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else:
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st.error("TXT ํ์ผ์ด ์๋๋๋ค.")
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if not doc_list:
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st.error("์ฒ๋ฆฌ ๊ฐ๋ฅํ ๋ฌธ์๋ฅผ ์ฐพ์ง ๋ชปํ์ต๋๋ค.")
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st.stop()
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text_chunks = get_text_chunks(doc_list)
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vectorstore = get_vectorstore(text_chunks)
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st.session_state.conversation = get_conversation_chain(vectorstore)
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if st.button("Process[CSV]"):
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with st.spinner("Processing"):
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doc_list = []
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for file in docs:
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print('file - type : ', file.type)
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if file.type == 'text/csv':
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doc_list.extend(get_csv_file(file))
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else:
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st.error("CSV ํ์ผ์ด ์๋๋๋ค.")
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if not doc_list:
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st.error("์ฒ๋ฆฌ ๊ฐ๋ฅํ ๋ฌธ์๋ฅผ ์ฐพ์ง ๋ชปํ์ต๋๋ค.")
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st.stop()
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text_chunks = get_text_chunks(doc_list)
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vectorstore = get_vectorstore(text_chunks)
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st.session_state.conversation = get_conversation_chain(vectorstore)
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if st.button("Process[JSON]"):
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with st.spinner("Processing"):
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doc_list = []
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for file in docs:
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print('file - type : ', file.type)
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if file.type == 'application/json':
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doc_list.extend(get_json_file(file))
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else:
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st.error("JSON ํ์ผ์ด ์๋๋๋ค.")
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if not doc_list:
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st.error("์ฒ๋ฆฌ ๊ฐ๋ฅํ ๋ฌธ์๋ฅผ ์ฐพ์ง ๋ชปํ์ต๋๋ค.")
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st.stop()
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text_chunks = get_text_chunks(doc_list)
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vectorstore = get_vectorstore(text_chunks)
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st.session_state.conversation = get_conversation_chain(vectorstore)
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if __name__ == '__main__':
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main() |