added the quiz application

Python/quizapp.py

@@ -0,0 +1,98 @@
+import streamlit as st
+import random
+import time
+
+# Sample questions data
+questions = [
+    {
+        "question": "Who invented Git?",
+        "answer": "Linus Torvalds",
+        "difficulty": "medium",
+        "hint": "Also the founder of the Linux distribution system."
+    },
+    {
+        "question": "What was the first name of Google?",
+        "answer": "Backrub",
+        "difficulty": "hard",
+        "hint": "Rubbing your back in a word."
+    },
+    {
+        "question": "What is WWW?",
+        "answer": "World Wide Web",
+        "difficulty": "easy",
+        "hint": "World _ _ _ _ web."
+    }
+]
+
+# Function to choose questions based on difficulty
+def choose_question(questions, difficulty):
+    return [question for question in questions if question['difficulty'] == difficulty]
+
+# Function to display the current question
+def display_question(questions, current_question, timer=10):
+    question_list = questions[current_question]
+    question = question_list['question']
+    answer = question_list['answer']
+    hint = question_list['hint']
+
+    st.subheader(f"Question {current_question + 1}: {question}")
+    user_answer = st.text_input("Your answer:")
+
+    if st.button("Submit Answer"):
+        if user_answer.strip().lower() == answer.lower():
+            st.success("Correct!")
+            st.session_state.score += 2 if not st.session_state.hint_used else 1
+        else:
+            st.error("Incorrect! The correct answer was: " + answer)
+
+        st.session_state.current_question += 1  # Move to the next question
+        st.session_state.hint_used = False  # Reset hint usage
+        st.session_state.start_time = time.time()  # Reset timer
+
+    if st.button("Get Hint") and not st.session_state.hint_used:
+        st.info(f"Hint: {hint}")
+        st.session_state.hint_used = True
+
+    # Timer
+    elapsed_time = time.time() - st.session_state.start_time
+    remaining_time = timer - int(elapsed_time)
+    st.write(f"Time remaining: {remaining_time} seconds")
+
+    # Check if time has run out
+    if remaining_time <= 0:
+        st.error("Time's up! The correct answer was: " + answer)
+        st.session_state.current_question += 1
+        st.session_state.start_time = time.time()
+
+# Main application code
+st.title("Quiz Challenge")
+
+# Initialize session state variables
+if 'score' not in st.session_state:
+    st.session_state.score = 0
+if 'current_question' not in st.session_state:
+    st.session_state.current_question = 0
+if 'hint_used' not in st.session_state:
+    st.session_state.hint_used = False
+if 'start_time' not in st.session_state:
+    st.session_state.start_time = time.time()
+
+# Difficulty selection and quiz start
+difficulty = st.selectbox("Choose a difficulty", ["easy", "medium", "hard"])
+if st.button("Start Quiz"):
+    selected_flashcards = choose_question(questions, difficulty)
+    random.shuffle(selected_flashcards)
+    st.session_state.flashcards = selected_flashcards
+    st.session_state.score = 0
+    st.session_state.current_question = 0
+    st.session_state.hint_used = False
+    st.session_state.start_time = time.time()
+
+# Quiz questions display
+if "flashcards" in st.session_state:
+    if st.session_state.current_question < len(st.session_state.flashcards):
+        display_question(st.session_state.flashcards, st.session_state.current_question)
+    else:
+        st.write(f"Quiz Over! Your final score is {st.session_state.score}")
+        if st.button("Play Again"):
+            st.session_state.clear()