Update app.py

app.py

@@ -42,7 +42,7 @@ st.markdown("## In which module do you have doubt?")
 col1, col2 = st.columns(2)
 with col1:
     if st.button("Python"):
-        st.switch_page("python.py")
+        st.switch_page("pages/python.py")
 with col2:
     if st.button("Machine Learning"):
         st.switch_page("machine_learning.py")