text: from functools import wraps
  from flask import  abort
  from flask_login import  current_user
  from .models import Permission
  def permission_required(permission):
      def decorator(f):
          @wraps(f)
          def decorated_function(*args,**kwargs):
              if not current_user.can(permission):
                  abort(403)
              return f(*args,**kwargs)
          return decorated_function
      return decorator
  def admin_required(f):
      return permission_required(Permission.Administrator)(f)
  def customer_required(f):
      return permission_required(Permission.AI_Recommend)(f)
  def gas_analysis_required(f):
      return permission_required(Permission.GasData_Analysis)(f)
  