[Tkinter] Updating box with Drop Down selection

[RCC99]

The line

Display1.insert(END, DropVal)

passes a reference to DropVal as it is not called with ()

If the function DropVal was called, it does not return anything so None would be returned.

Thanks heaps for your comment

I have changed the if statement to be:

if Drop==options[1]:
        weightlist = [0]
        Display1.set(weightlist[0]) 

# Lists

options=[
    "Please Select a Destination",
    "Destinationone",
    "Destinationtwo",
    "Destinationthree",
    "Destinationfour",
    "Destinationfive",
    "Destinationsix",
    "Destiinationseven",
    "Destinationeight"
    ]

weightlist=[
    0.3,
    0.9,
    0.16,
    0.3,
    0.18,
    0.13,
    0.14,
    0.12,
    ]

I am trying to work out if a user selects 'Destinationone' how to display the number in weightlist 0.3.

Would you have any ideas on how i can do this?