old_contents: from flask import abort, flash, redirect, render_template, url_for
  from flask_login import current_user, login_required
  
  from . import admin
  from .. import db
  from ..models import Thing
  
  @inventory.route('/inventory', methods=['GET', 'POST'])
  @login_required
  def inventory():
      # show current inventory list
  
      items = Thing.query.all()
      # render template
      return render_template('inventory/item.html', items=items, title='Inventory')
  
new_contents: from flask import abort, flash, redirect, render_template, url_for
  from flask_login import current_user, login_required
  
  from . import inventory
  from .. import db
  from ..models import Thing
  
  @inventory.route('/inventory', methods=['GET', 'POST'])
  @login_required
  def inventory():
      # show current inventory list
  
      items = Thing.query.all()
      # render template
      return render_template('inventory/item.html', items=items, title='Inventory')
  
subject: Fix import