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app.py

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+# -*- coding: utf-8 -*-
+"""app
+
+Automatically generated by Colab.
+
+Original file is located at
+    https://colab.research.google.com/drive/1pwwcBb5Zlw1DA3u5K8W8mjrwBTBWXc1L
+"""
+
+import gradio as gr
+import numpy as np
+from transformers import pipeline
+import os
+import time
+import groq
+import uuid  # For generating unique filenames
+
+# Updated imports to address LangChain deprecation warnings:
+from langchain_groq import ChatGroq
+from langchain.schema import HumanMessage
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain_community.vectorstores import Chroma
+from langchain_community.embeddings import HuggingFaceEmbeddings
+from langchain.docstore.document import Document
+
+# Importing chardet (make sure to add chardet to your requirements.txt)
+import chardet
+
+import fitz  # PyMuPDF for PDFs
+import docx  # python-docx for Word files
+import gtts  # Google Text-to-Speech library
+from pptx import Presentation  # python-pptx for PowerPoint files
+import re
+
+# Initialize Whisper model for speech-to-text
+transcriber = pipeline("automatic-speech-recognition", model="openai/whisper-base.en")
+
+# Set API Key (Ensure it's stored securely in an environment variable)
+groq.api_key = os.getenv("GROQ_API_KEY")  # Replace with a valid API key
+
+#___________________________________
+
+# Authenticate with Hugging Face API using the token
+#hf_token = os.getenv("HF_TOKEN")  # Replace with the environment variable containing your Hugging Face token
+#login(token=hf_token)
+
+# Load the LLaVA model
+#model_id = "liuhaotian/LLaVA-7B"  # You can change the model ID based on what is available
+#processor = AutoProcessor.from_pretrained(model_id)
+#model = AutoModelForVision2Seq.from_pretrained(model_id, torch_dtype=torch.float16).cuda()
+
+# Load and preprocess an image
+#image = Image.open("your_image.jpg")  # Replace with the path to your image
+#inputs = processor(text="Describe this image", images=image, return_tensors="pt").to("cuda")
+
+# Generate output from LLaVA model
+#output = model.generate(**inputs)
+
+# Decode and print the output
+#print(processor.decode(output[0]))
+
+#___________________________________
+
+# Initialize Chat Model
+chat_model = ChatGroq(model_name="deepseek-r1-distill-qwen-32b", api_key=groq.api_key) #DeepSeek-R1-Distill-Llama-70b
+
+# Initialize Embeddings and chromaDB
+embedding_model = HuggingFaceEmbeddings()
+vectorstore = Chroma(embedding_function=embedding_model)
+
+# Short-term memory for the LLM
+chat_memory = []
+
+# Prompt for quiz generation with added remark
+quiz_prompt = """
+You are an AI assistant specialized in education and assessment creation. Given an uploaded document or text, generate a quiz with a mix of multiple-choice questions (MCQs) and fill-in-the-blank questions. The quiz should be directly based on the key concepts, facts, and details from the provided material.
+Generate 20 Questions.
+Remove all unnecessary formatting generated by the LLM, including <think> tags, asterisks, markdown formatting, and any bold or italic text, as well as **, ###, ##, and # tags.
+For each question:
+- Provide 4 answer choices (for MCQs), with only one correct answer.
+- Ensure fill-in-the-blank questions focus on key terms, phrases, or concepts from the document.
+- Include an answer key for all questions.
+- Ensure questions vary in difficulty and encourage comprehension rather than memorization.
+- Additionally, implement an instant feedback mechanism:
+    - When a user selects an answer, indicate whether it is correct or incorrect.
+    - If incorrect, provide a brief explanation from the document to guide learning.
+    - Ensure responses are concise and educational to enhance understanding.
+Output Example:
+1. Fill in the blank: The LLM Agent framework has a central decision-making unit called the _______________________.
+Answer: Agent Core
+Feedback: The Agent Core is the central component of the LLM Agent framework, responsible for managing goals, tool instructions, planning modules, memory integration, and agent persona.
+2. What is the main limitation of LLM-based applications?
+a) Limited token capacity
+b) Lack of domain expertise
+c) Prone to hallucination
+d) All of the above
+Answer: d) All of the above
+Feedback: LLM-based applications have several limitations, including limited token capacity, lack of domain expertise, and being prone to hallucination, among others.
+"""
+
+# Function to clean AI response by removing unwanted formatting
+def clean_response(response):
+    """Removes <think> tags, asterisks, and markdown formatting."""
+    cleaned_text = re.sub(r"<think>.*?</think>", "", response, flags=re.DOTALL)
+    cleaned_text = re.sub(r"(\*\*|\*|\[|\])", "", cleaned_text)
+    cleaned_text = re.sub(r"^##+\s*", "", cleaned_text, flags=re.MULTILINE)
+    cleaned_text = re.sub(r"\\", "", cleaned_text)
+    cleaned_text = re.sub(r"---", "", cleaned_text)
+    return cleaned_text.strip()
+
+# Function to generate quiz based on content
+def generate_quiz(content):
+    prompt = f"{quiz_prompt}\n\nDocument content:\n{content}"
+    response = chat_model([HumanMessage(content=prompt)])
+    cleaned_response = clean_response(response.content)
+    return cleaned_response
+
+# Function to retrieve relevant documents from vectorstore based on user query
+def retrieve_documents(query):
+    results = vectorstore.similarity_search(query, k=3)
+    return [doc.page_content for doc in results]
+
+# Function to handle chatbot interactions with short-term memory
+def chat_with_groq(user_input):
+    try:
+        # Retrieve relevant documents for additional context
+        relevant_docs = retrieve_documents(user_input)
+        context = "\n".join(relevant_docs) if relevant_docs else "No relevant documents found."
+
+        # Construct proper prompting with conversation history
+        system_prompt = "You are a helpful AI assistant. Answer questions accurately and concisely."
+        conversation_history = "\n".join(chat_memory[-10:])  # Keep the last 10 exchanges
+        prompt = f"{system_prompt}\n\nConversation History:\n{conversation_history}\n\nUser Input: {user_input}\n\nContext:\n{context}"
+
+        # Call the chat model
+        response = chat_model([HumanMessage(content=prompt)])
+
+        # Clean response to remove any unwanted formatting
+        cleaned_response_text = clean_response(response.content)
+
+        # Append conversation history
+        chat_memory.append(f"User: {user_input}")
+        chat_memory.append(f"AI: {cleaned_response_text}")
+
+        # Convert response to speech
+        audio_file = speech_playback(cleaned_response_text)
+
+        # Ensure the return format is a list of tuples
+        return [(user_input, cleaned_response_text)], audio_file
+    except Exception as e:
+        return [("Error", str(e))], None
+
+
+# Function to play response as speech using gTTS
+def speech_playback(text):
+    try:
+        # Generate a unique filename for each audio file
+        unique_id = str(uuid.uuid4())
+        audio_file = f"output_audio_{unique_id}.mp3"
+
+        # Convert text to speech
+        tts = gtts.gTTS(text, lang='en')
+        tts.save(audio_file)
+
+        # Return the path to the audio file
+        return audio_file
+    except Exception as e:
+        print(f"Error in speech_playback: {e}")
+        return None
+
+# Function to detect encoding safely
+def detect_encoding(file_path):
+    try:
+        with open(file_path, "rb") as f:
+            raw_data = f.read(4096)
+            detected = chardet.detect(raw_data)
+            encoding = detected["encoding"]
+        return encoding if encoding else "utf-8"
+    except Exception:
+        return "utf-8"
+
+# Function to extract text from PDF
+def extract_text_from_pdf(pdf_path):
+    try:
+        doc = fitz.open(pdf_path)
+        text = "\n".join([page.get_text("text") for page in doc])
+        return text if text.strip() else "No extractable text found."
+    except Exception as e:
+        return f"Error extracting text from PDF: {str(e)}"
+
+# Function to extract text from Word files (.docx)
+def extract_text_from_docx(docx_path):
+    try:
+        doc = docx.Document(docx_path)
+        text = "\n".join([para.text for para in doc.paragraphs])
+        return text if text.strip() else "No extractable text found."
+    except Exception as e:
+        return f"Error extracting text from Word document: {str(e)}"
+
+# Function to extract text from PowerPoint files (.pptx)
+def extract_text_from_pptx(pptx_path):
+    try:
+        presentation = Presentation(pptx_path)
+        text = ""
+        for slide in presentation.slides:
+            for shape in slide.shapes:
+                if hasattr(shape, "text"):
+                    text += shape.text + "\n"
+        return text if text.strip() else "No extractable text found."
+    except Exception as e:
+        return f"Error extracting text from PowerPoint: {str(e)}"
+
+# Function to process documents safely
+def process_document(file):
+    try:
+        file_extension = os.path.splitext(file.name)[-1].lower()
+        if file_extension in [".png", ".jpg", ".jpeg"]:
+            return "Error: Images cannot be processed for text extraction."
+        if file_extension == ".pdf":
+            content = extract_text_from_pdf(file.name)
+        elif file_extension == ".docx":
+            content = extract_text_from_docx(file.name)
+        elif file_extension == ".pptx":
+            content = extract_text_from_pptx(file.name)
+        else:
+            encoding = detect_encoding(file.name)
+            with open(file.name, "r", encoding=encoding, errors="replace") as f:
+                content = f.read()
+        text_splitter = RecursiveCharacterTextSplitter(chunk_size=500, chunk_overlap=50)
+        documents = [Document(page_content=chunk) for chunk in text_splitter.split_text(content)]
+        vectorstore.add_documents(documents)
+        quiz = generate_quiz(content)
+        return f"Document processed successfully (File Type: {file_extension}). Quiz generated:\n{quiz}"
+    except Exception as e:
+        return f"Error processing document: {str(e)}"
+
+# Function to handle speech-to-text conversion
+def transcribe_audio(audio):
+    sr, y = audio
+    if y.ndim > 1:
+        y = y.mean(axis=1)
+    y = y.astype(np.float32)
+    y /= np.max(np.abs(y))
+    return transcriber({"sampling_rate": sr, "raw": y})["text"]
+
+# Modify chat_with_groq function to return audio file for playback
+def chat_with_groq(user_input):
+    try:
+        # Retrieve relevant documents for additional context
+        relevant_docs = retrieve_documents(user_input)
+        context = "\n".join(relevant_docs) if relevant_docs else "No relevant documents found."
+
+        # Construct proper prompting with conversation history
+        system_prompt = "You are a helpful AI assistant. Answer questions accurately and concisely."
+        conversation_history = "\n".join(chat_memory[-10:])  # Keep the last 10 exchanges
+        prompt = f"{system_prompt}\n\nConversation History:\n{conversation_history}\n\nUser Input: {user_input}\n\nContext:\n{context}"
+
+        # Call the chat model
+        response = chat_model([HumanMessage(content=prompt)])
+
+        # Clean response to remove any unwanted formatting
+        cleaned_response_text = clean_response(response.content)
+
+        # Append conversation history
+        chat_memory.append(f"User: {user_input}")
+        chat_memory.append(f"AI: {cleaned_response_text}")
+
+        # Convert response to speech
+        audio_file = speech_playback(cleaned_response_text)
+
+        # Return both chat response and audio file path
+        return [(user_input, cleaned_response_text)], audio_file  # Return as a tuple
+    except Exception as e:
+        return [("Error", str(e))], None
+
+#__________________________________________________________________________________________________________________________
+
+
+
+def tutor_ai_chatbot():
+    """Main Gradio interface for the Tutor AI Chatbot."""
+    with gr.Blocks() as app:
+        gr.Markdown("# 📚 AI Tutor - We.(POC)")
+        gr.Markdown("An interactive Personal AI Tutor chatbot to help with your learning needs.")
+
+        # Chatbot Tab
+        with gr.Tab("AI Chatbot"):
+            with gr.Row():
+                with gr.Column(scale=3):
+                    chatbot = gr.Chatbot(height=500)  # Chatbot display area
+                    with gr.Row():
+                        msg = gr.Textbox(label="Ask a question", placeholder="Type your question here...")
+                        submit = gr.Button("Send")
+                        # Create the chat interface
+                        #msg = gr.ChatInterface(fn=chat_with_groq, type="messages", autofocus=False)  #test
+
+                    #with gr.Row():
+                    with gr.Column(scale=1):
+                        audio_input = gr.Audio(type="numpy", label="Record or Upload Audio")   # Audio input for speech-to-text
+
+
+                with gr.Column(scale=1):
+                   audio_playback = gr.Audio(label="Audio Response", type="filepath")
+
+            # Clear chat history button
+            clear_btn = gr.Button("Clear Chat")
+
+            # Handle chat interaction
+            submit.click(
+                chat_with_groq,
+                inputs=[msg],
+                outputs=[chatbot, audio_playback]
+            )
+
+            # Clear chat history function
+            def clear_chat_history():
+                return None, None
+
+            clear_btn.click(clear_chat_history, inputs=None, outputs=[chatbot, audio_playback])    #,audio_input
+
+            # Also allow Enter key to submit
+            msg.submit(
+                chat_with_groq,
+                inputs=[msg],
+                outputs=[chatbot, audio_playback]
+            )
+
+            # Add some examples of questions students might ask
+            with gr.Accordion("Example Questions", open=False):
+                gr.Examples(
+                    examples=[
+                        "Can you explain the concept of RLHF AI?",
+                        "What are AI transformers?",
+                        "What is MoE AI?",
+                        "What's gate networks AI?",
+                        "I am making a switch, please generating baking recipe?"
+                    ],
+                    inputs=msg
+                )
+
+        # Upload Notes & Generate Quiz Tab
+        with gr.Tab("Upload Notes & Generate Quiz"):
+            with gr.Row():
+                with gr.Column(scale=2):
+                    file_input = gr.File(label="Upload Lecture Notes (PDF, DOCX, PPTX)")
+                    #generate_btn = gr.Button("Generate Quiz")
+                with gr.Column(scale=3):
+                    quiz_output = gr.Textbox(label="Generated Quiz", lines=10)
+
+
+         # Introduction Video
+        with gr.Tab("Introduction Video"):
+            with gr.Row():
+                with gr.Column(scale=1):
+                    #with gr.Column(scale=1):  # Adjust scale for equal width
+                    gr.Markdown("### Welcome to the Introduction Video")  # Adding a heading
+                    gr.Markdown("Music from Xu Mengyuan - China-O, musician Xu Mengyuan YUAN! | 徐梦圆 - China-O 音乐人徐梦圆YUAN! ")  # Adding descriptive text
+                    gr.Video("https://github.com/lesterchia1/AI_tutor/raw/main/We%20not%20me%20video.mp4", label="Introduction Video")
+
+
+
+            # Connect the button to the document processing function
+            audio_input.change(fn=transcribe_audio, inputs=audio_input, outputs=msg)  # transcribe and fill the msg textbox
+            file_input.change(process_document, inputs=file_input, outputs=quiz_output)
+
+
+    # Launch the application
+    app.launch(share=True)  # Set share=True to create a public link
+
+    # Add cleanup function to be triggered periodically (e.g., every time a button is clicked or after certain actions)
+    #demo.load(lambda: cleanup_old_files(directory="./", age_limit=60), inputs=[], outputs=[])
+
+
+# Launch the AI chatbot
+if __name__ == "__main__":
+    tutor_ai_chatbot()

apt.txt

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+espeak

requirements.txt

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+gradio
+groq
+gtts
+langchain
+langchain-core
+langchain-community
+langchain-text-splitters
+langgraph
+chromadb
+langsmith
+llama-cpp-python
+langchain_huggingface
+pymupdf
+sentence_transformers
+langchain-groq
+langchain-docling
+langchain-chroma
+pyttsx3
+chardet
+torchaudio
+numpy
+transformers
+uuid
+pymupdf  # for fitz (PyMuPDF)
+python-docx  # for docx
+gtts
+python-pptx