added necessary code

app.py

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+import streamlit as st # type: ignore
+import pandas as pd # type: ignore
+
+# Initialize notes dataframe
+notes_df = pd.DataFrame(columns=['Title', 'Content'])
+
+# Function to add a new note
+def add_note(title, content):
+    new_note = pd.DataFrame({'Title': [title], 'Content': [content]})
+    global notes_df
+    notes_df = pd.concat([notes_df, new_note], ignore_index=True)
+
+# Function to update a note
+def update_note(index, title, content):
+    global notes_df
+    notes_df.at[index, 'Title'] = title
+    notes_df.at[index, 'Content'] = content
+
+# Function to delete a note
+def delete_note(index):
+    global notes_df
+    notes_df = notes_df.drop(index)
+
+# Streamlit app
+st.title("Note-Taking Application")
+
+# Create a new note
+st.header("Create a New Note")
+title = st.text_input("Title")
+content = st.text_area("Content")
+if st.button("Add Note"):
+    add_note(title, content)
+
+# Display all notes
+st.header("All Notes")
+st.write(notes_df)
+
+# Update a note
+st.header("Update a Note")
+index = st.selectbox("Select a Note to Update", notes_df.index)
+if st.button("Update Note"):
+    title = st.text_input("New Title")
+    content = st.text_area("New Content")
+    update_note(index, title, content)
+
+# Delete a note
+st.header("Delete a Note")
+index = st.selectbox("Select a Note to Delete", notes_df.index)
+if st.button("Delete Note"):
+    delete_note(index)

requirements.txt

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+streamlit