colons in my code bring up a syntax err0r [closed]

this is the code I have so far that keeps bringing up a "syntax error" for the colon on the first if statement

shoppinglist = ["milk","bread","rice"]
print("this is your current list",)
print(shoppinglist)
def ideas():
    idea=str(input("is this your final list??")
    if idea in ['y', 'Y', 'yes', 'Yes', 'YES']:
             print("your list is" + shoppinglist)

please help.