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app.py

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+import streamlit as st
+
+def get_text(): #from the UI App
+    input_text = st.text_input("Enter a question: ", key="input")
+    return input_text
+    
+#UIApp starts here
+st.set_page_config(page_title="LangChain Demo - Simple Question Answering App", page_icon=":robot:")
+st.header("Simple Question Answering App")
+
+user_input=get_text()
+response=load_answer(user_input)
+
+submit=st.button('Generate')
+if submit:
+    st.subheader("Answer: ")
+    st.write(response)

requirements.txt

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+Streamlit