old_contents: import os
  from flask import render_template, Blueprint, send_file
  
  
  main = Blueprint('main', __name__, template_folder='templates', static_folder='static/gen', static_url_path='/static')
  
  
  @main.route('/templates/<path:partial>')
  def render_partial(partial=None):
      return render_template(partial + '.html')
  
  
  @main.route('/favicon.ico')
  def send_favicon():
      return send_file('static/favicon.ico')
  
  
  @main.route('/upload/<path:name>')
  def upload(name=None):
      if os.path.exists(os.path.join('upload/'+name)):
          return send_file(os.path.join('upload/'+name))
      else:
          return "File not found  :(", 400
  
  @main.route('/')
  @main.route('/<path:path>')
  def index(path=None):
      return render_template('index.html')
  
  
new_contents: import os
  from flask import render_template, Blueprint, send_file
  
  
  main = Blueprint('main', __name__, template_folder='templates', static_folder='static/gen', static_url_path='/static')
  
  
  @main.route('/templates/<path:partial>')
  def render_partial(partial=None):
      return render_template(partial + '.html')
  
  
  @main.route('/favicon.ico')
  def send_favicon():
      return send_file('static/favicon.ico')
  
  
  @main.route('/upload/<path:name>')
  def upload(name=None):
      print(os.getcwd())
      if os.path.exists(os.path.join('upload/'+name)):
          return send_file(os.path.join('upload/'+name))
      else:
          return "File not found  :(", 400
  
  @main.route('/')
  @main.route('/<path:path>')
  def index(path=None):
      return render_template('index.html')
  
  
subject: Debug output.