First full save

app.py

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+import streamlit as st
+import time
+import sqlite3
+import json
+import random
+
+# Create a SQLite database to store quiz data
+conn = sqlite3.connect('quiz_data.db')
+c = conn.cursor()
+c.execute('''CREATE TABLE IF NOT EXISTS quiz_history
+             (timestamp TEXT, score INTEGER, total_time REAL, 
+              question_times TEXT, questions TEXT, user_answers TEXT)''')
+conn.commit()
+
+# Function to generate random multiple-choice questions
+def generate_questions():
+    questions = [
+        "What is the capital of France?",
+        "What is the largest planet in our solar system?",
+        "Who painted the Mona Lisa?",
+        "In what year did World War II begin?",
+        "What is the chemical symbol for gold?"
+    ]
+    options = [
+        ["Paris", "London", "Berlin", "Madrid"],
+        ["Jupiter", "Saturn", "Earth", "Mars"],
+        ["Leonardo da Vinci", "Michelangelo", "Raphael", "Donatello"],
+        ["1939", "1941", "1945", "1914"],
+        ["Au", "Ag", "Fe", "Cu"]
+    ]
+
+    # Create a list of tuples to combine questions and options
+    question_option_pairs = list(zip(questions, options)) 
+
+    # Shuffle the pairs
+    random.shuffle(question_option_pairs)
+
+    # Unpack the shuffled pairs
+    questions, options = zip(*question_option_pairs)
+
+    return list(questions), list(options)
+
+# Function to start a timer
+def start_timer():
+    start_time = time.time()
+    return start_time
+
+# Function to calculate elapsed time
+def calculate_time(start_time):
+    elapsed_time = time.time() - start_time
+    return elapsed_time
+
+def start_quiz_callback():
+    st.session_state.quiz_started = True
+    st.session_state.questions, st.session_state.options = generate_questions()
+    st.session_state.total_start_time = start_timer()
+
+def next_question_callback(user_answer):
+    st.session_state.user_answers.append(user_answer)
+    st.session_state.question_durations.append(calculate_time(st.session_state.item_start_time))
+    st.session_state.item_start_time = None
+    st.session_state.current_question += 1
+
+def show_results_callback():
+    st.session_state.total_time = calculate_time(st.session_state.total_start_time)
+    # Calculate score
+    correct_answers = ["Paris", "Jupiter", "Leonardo da Vinci", "1939", "Au"] 
+    score = sum([1 for i in range(len(st.session_state.questions)) if st.session_state.user_answers[i] == correct_answers[i]])
+
+    # Display results
+    st.header("Results")
+    st.write(f"Your Score: {score}/{len(st.session_state.questions)}")
+    st.write(f"Total Time: {st.session_state.total_time:.2f} seconds")
+    st.write("Time per Question:")
+    for i, duration in enumerate(st.session_state.question_durations):
+        st.write(f"Question {i+1}: {duration:.2f} seconds")
+
+    # Save results to database
+    timestamp = time.strftime("%Y-%m-%d %H:%M:%S")
+    question_times_json = json.dumps(st.session_state.question_durations)
+    questions_json = json.dumps(st.session_state.questions)
+    user_answers_json = json.dumps(st.session_state.user_answers)
+    c.execute("INSERT INTO quiz_history VALUES (?, ?, ?, ?, ?, ?)", 
+            (timestamp, score, st.session_state.total_time, question_times_json, questions_json, user_answers_json))
+    conn.commit()
+
+def delete_attempt_callback(timestamp):
+    c.execute("DELETE FROM quiz_history WHERE timestamp=?", (timestamp,))
+    conn.commit()
+    st.rerun()
+
+# Streamlit app
+def main():
+    st.title("Sample Quiz App")
+
+    # Initialize session state variables
+    if 'page' not in st.session_state:
+        st.session_state.page = "Quiz"
+    if 'questions' not in st.session_state:
+        st.session_state.questions = None
+    if 'options' not in st.session_state:
+        st.session_state.options = None
+    if 'current_question' not in st.session_state:
+        st.session_state.current_question = 0
+    if 'user_answers' not in st.session_state:
+        st.session_state.user_answers = []
+    if 'question_durations' not in st.session_state:
+        st.session_state.question_durations = []
+    if 'total_start_time' not in st.session_state:
+        st.session_state.total_start_time = None
+    if 'item_start_time' not in st.session_state:
+        st.session_state.item_start_time = None
+    if 'quiz_started' not in st.session_state:
+        st.session_state.quiz_started = False
+
+    # Choose between Quiz, History, and About pages
+    st.session_state.page = st.sidebar.radio("Select Page", ["Quiz", "History", "About"])
+
+    if st.session_state.page == "Quiz":
+        st.header("Take the Quiz")
+
+        if not st.session_state.quiz_started:
+            if st.button("Start Quiz", key="start_quiz", on_click=start_quiz_callback()):
+                pass
+        else:   
+            if st.session_state.current_question < len(st.session_state.questions):
+                if st.session_state.item_start_time is None:
+                    st.session_state.item_start_time = start_timer() 
+
+                st.subheader(f"Question {st.session_state.current_question + 1}")
+                st.write(st.session_state.questions[st.session_state.current_question])
+                user_answer = st.selectbox("Select your answer:", ["Select an option"] + st.session_state.options[st.session_state.current_question], key="user_answer")
+
+                if user_answer != "Select an option":
+                    if st.button("Next", key="next_question", on_click=next_question_callback(user_answer)):
+                        pass
+                else:
+                    st.warning("Please select an answer.")  
+            else:
+                show_results_callback()
+
+    elif st.session_state.page == "History":
+        st.header("Quiz History")
+
+        # Retrieve history from database
+        c.execute("SELECT * FROM quiz_history")
+        rows = c.fetchall()
+
+        if rows:
+            for index, row in enumerate(rows):
+                timestamp, score, total_time, question_times_json, questions_json, user_answers_json = row
+                question_times = json.loads(question_times_json)
+                questions = json.loads(questions_json)
+                user_answers = json.loads(user_answers_json)
+
+                st.write(f"Timestamp: {timestamp}")
+                st.write(f"Score: {score}/{len(questions)}")
+                st.write(f"Total Time: {total_time:.2f} seconds")
+
+                st.write("**Summary:**")
+                correct_answers = ["Paris", "Jupiter", "Leonardo da Vinci", "1939", "Au"] 
+                for i, question in enumerate(questions):
+                    st.write(f"- {question}: {'Correct' if user_answers[i] == correct_answers[i] else 'Incorrect'}")
+
+                st.write("Time per Question:")
+                for i, duration in enumerate(question_times):
+                    st.write(f"Question {i+1}: {duration:.2f} seconds")
+
+                if st.button("Delete This Attempt", key=f"{timestamp}_{index}"):
+                    delete_attempt_callback(timestamp)
+        else:
+            st.write("No previous quiz attempts found.")    
+                
+    elif st.session_state.page == "About":
+        st.header("About")
+        st.write("This is a simple quiz application for educational purposes.")
+        st.write("**Instructions:**")
+        st.write("- Select 'Quiz' from the sidebar to begin.")
+        st.write("- Click 'Start Quiz' to start the timer and begin the quiz.")
+        st.write("- Answer each question and click 'Next' to proceed.")
+        st.write("- After completing all questions, your results will be displayed.")
+        st.write("- Select 'History' to view your past quiz attempts.")
+        st.write("- You can delete individual attempts from the history.")
+
+if __name__ == "__main__":
+    main()

requirements.txt

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+streamlit