>>> import datetime
>>> user_name=input("Enter your name:")
Enter your name:bhavya_vijay
>>> now=datetime.datetime.now()
>>> this_time=now.hour

>>> if this_time in range(6,12):
	      print("Good Morning...{}".format(user_name))
    elif this_time in range(12,16):
	      print("Good Afternoon...{}".format(user_name))
    elif this_time in range(16,20):
	      print("Good Evening...{}".format(user_name))
    else :
	      print("Good Night...{}".format(user_name))
