Python Python Basics (2015) Python Data Types Use .split() and .join()

Can't figure it out what to do next

Plz check and plz explain briefly what is wrong with my code.....

banana.py
available = "banana split;hot fudge;cherry;malted;black and white"
sundaes = available.split(";")
menu = "Our available flavors are : {}".format(display_menu)
display_menu = ", ".join(sundaes)

You are using the display_menu variable before it is defined.

available = "banana split;hot fudge;cherry;malted;black and white"
sundaes = available.split(";")
display_menu = ", ".join(sundaes)
menu = "Our available flavors are : {}".format(display_menu)