why does in Python code time.sleep(3) not print items from list every 3 secs...? here is my simple code that i am running in http://py3.codeskulptor.org

for some reason the sleep(3) holds everything and then prints it at one time....!!!??... but according to code description, suppose to print a line every 3 secs

import time

mylist = ['aaa','bbb','ccc']

for i in mylist:

time.sleep(3)

print(i)