Make sure that you defined the variable "now"!

I am using codeacademy.com to try to learn python and it keeps saying above message when i clearly defined it

http://www.codecademy.com/courses/python-beginner-en-zFPOx/0?curriculum_id=4f89dab3d788890003000096#!/exercises/1

if i did anything wring could someone correct iit for me and post it here please ty

from datetime import datetime

now = datetime.now()
print(now)