I am trying to create checkboxes from a list. (`biomelis_ = ['Arctic','Hill','Coast', 'Desert', 'Forest','Grassland', 'Mountain', 'Swamp', 'Underdark','Underwater', 'Urban' ]`). 

I then want to check the boxes and press "go". I am trying to get the output to be a list. For example, if I check 'Arctic', 'Hill', and 'Coast', my output will be `['Arctic', 'Hill', 'Coast']`. I have been reading through the documentation but I am struggling with this.

Here is the full code: 

```
from tkinter import *

biomelis_ = ['Arctic', 'Hill', 'Coast', 'Desert', 'Forest', 'Grassland', 'Mountain', 'Swamp', 'Underdark', 'Underwater',
             'Urban']

root = Tk()
var = StringVar()

# var.set(biomelis_ [0])

def sel():
    biome_lis_selection = var.get()
    print(biome_lis_selection)
    return [biome_lis_selection]

for item in range(len(biomelis_)):
    l = Checkbutton(root, text=biomelis_[item], variable=var)
    print("l = Checkbutton(root, text=" + str(biomelis_[item]) + ", variable=" + str(var))
    l.pack(anchor='w')

def go():  ### runs tkinter

    biomes_Checklist = sel()
    b.config(state=NORMAL)
    b.delete('1.0', END)
    b.insert(INSERT, sel())
    b.config(state=DISABLED)

## defines go button. This launches the def go() when the go button is pressed.
go_button = Button(root, text="Go!", width=10, command=go)
go_button.pack()
b = Text(root)
b.pack()

root.mainloop()

```

This is the part that I am struggling with-getting the selected items.

```
l = Checkbutton(root, text=biomelis_[item], variable=var)

```

This returns 'l' instead of individual items in the list. Also all of the checkboxes check and uncheck at once.