Update app.py

app.py

@@ -1,6 +1,27 @@
 import streamlit as st
 import requests
 
+# Predefined list of top 100 topics
+TOP_100_TOPICS = [
+    "Science", "History", "Philosophy", "Technology", "Art", "Mathematics", "Literature", "Psychology", "Sociology",
+    "Economics", "Education", "Business", "Health", "Religion", "Politics", "Law", "Engineering", "Physics",
+    "Chemistry", "Astronomy", "Geography", "Medicine", "Music", "Theology", "Anthropology", "Archaeology",
+    "Linguistics", "Architecture", "Astronomy", "Biology", "Geology", "Botany", "Zoology", "Microbiology",
+    "Cultural Studies", "Environmental Studies", "Agriculture", "Urban Studies", "Gender Studies", "Film Studies",
+    "Political Science", "Social Science", "Computer Science", "Artificial Intelligence", "Robotics", "Econometrics",
+    "Communication", "Public Policy", "International Relations", "Global Studies", "Cognitive Science", "Mathematical Physics",
+    "Public Health", "Neuroscience", "Genetics", "Quantum Mechanics", "Linguistic Anthropology", "Classical Studies",
+    "Business Management", "Marketing", "Tourism", "Fashion", "Sports Science", "Nutrition", "Forensic Science", 
+    "Public Administration", "Climate Science", "Oceanography", "Agricultural Engineering", "Renewable Energy", "Industrial Design",
+    "Entrepreneurship", "Social Work", "Criminal Justice", "Architecture and Urban Planning", "Computer Networks", "Cybersecurity",
+    "Pharmacology", "Veterinary Science", "Sports Studies", "Ethics", "Law Enforcement", "Geophysics", "Paleontology",
+    "Education Technology", "Artificial Intelligence in Education", "Food Science", "Human Geography", "Social Media", "Climate Change",
+    "Humanitarian Studies", "Creative Writing", "Music Composition", "Geospatial Technology", "Leadership", "Data Science", "Software Engineering",
+    "Marine Biology", "Financial Engineering", "Digital Media", "Neuroeconomics", "Public Speaking", "Digital Marketing", "Organizational Behavior",
+    "Criminology", "Human Rights", "Energy Studies", "Supply Chain Management", "Risk Management", "AI Ethics", "Food Security", "Healthcare Management",
+    "Digital Transformation", "Sustainability", "Mental Health", "Cyber Law", "Civil Engineering", "Mechanical Engineering", "Electrical Engineering"
+]
+
 # Function to fetch books from Open Library API
 def fetch_books(subject, start_year, end_year):
     base_url = "https://openlibrary.org/search.json"
@@ -32,13 +53,13 @@ def main():
     st.write("Find books by subject and publication year range.")
 
     # User inputs
-    subject = st.text_input("Enter a subject (e.g., Science, History):", "Science")
-    start_year = st.number_input("Enter start year:", min_value=1800, max_value=2100, value=2000)
-    end_year = st.number_input("Enter end year:", min_value=1800, max_value=2100, value=2020)
+    subject = st.selectbox("Select a subject from the list:", TOP_100_TOPICS)
+    start_year = st.number_input("Enter start year:", min_value=1700, max_value=2025, value=2000)
+    end_year = st.number_input("Enter end year:", min_value=1700, max_value=2025, value=2020)
 
     if st.button("Search"):
         if not subject:
-            st.error("Please enter a subject.")
+            st.error("Please select a subject.")
         elif start_year > end_year:
             st.error("Start year must be less than or equal to end year.")
         else: