Create Optionmenu with for loop

Question

I am pretty new to Python as well as coding in general.

I've got 42 Labels (Strings) stored in a list. My aim is to: for each of the 42 labels, create a Tkinter Label displaying the String and a Dropdown List (Tkinter Optionmenu).

Two problems occur:

• I get an index error for the list of variables (for the optionmenus), here is the output of my Console:

  varDd[i] = StringVar(root) IndexError: list assignment index out of range

• The Canvas is Scrollable as I intended, but the content doesn't scroll with it

My complete Code: https://codepaste.net/6jkuza

The essential part:

def createDdList():    
    del labelsDd[:]
    del listsDd[:]
        if len(labels) > 1:
            varDd = [len(labels)]
            for i,label in enumerate(labels):
#               Erstelle Labels mit den Markerlabels im scrollbaren Canvas
                labelsDd.append(Label(contentCanvas,text=label))
                labelsDd[i].pack()
#               Erstelle die Dropdown Listen im scrollbaren Canvas
                varDd[i] = StringVar(root)
                listsDd.append(OptionMenu(canvas,varDd[i],*labels))  
                listsDd[i].place(x=70,y=10+(30*i))

contentCanvas = Frame(canvas,bg='#FFFFFF')
canvas.create_window((0,375),window=contentCanvas)

Answer 1

The first issue arrises from this like:

varDd = [len(labels)]

While this syntax is used in other languages to mean "a list with this many elements in python it is just a list with one number:

>>> labels = range(4)
>>> v = [len(labels)]
>>> v
[4]

Instead you probably want something along the lines of this:

>>> varDb = [None]*len(labels)
>>> varDb
[None, None, None, None]

Then you can index it the same way as your other lists

---

The other issue is that using .place() inside a canvas places it on the screen but not on the canvas space itself, to do that you need to call canvas.create_window so this line:

listsDd[i].place(x=70,y=10+(30*i))

would translate to this:

canvas.create_window(70, 10+(30*i), window = listsDd[i])