update code for flask 3.0

views/blog.py

@@ -1,8 +1,9 @@
 # -*- coding: utf-8 -*-
 
 
-from flask import Blueprint, escape, render_template, session, redirect, url_for, request, flash, abort, Flask
+from flask import Blueprint, render_template, session, redirect, url_for, request, flash, abort, Flask
 import time
+from markupsafe import escape
 import sqlite3
 from markdown import markdown
 postit = Blueprint('post-it', __name__, template_folder='templates')