python将列表分配给tk stringvar

Question

I'm having some trouble with stringVars from TK.

from tkinter import *

root = Tk()
strVar = StringVar()
tmp1 = ['one','two','three']
print(tmp1)
print(len(tmp1))

strVar.set(tmp1)
tmp2=strVar.get()
print(tmp2)
print(len(tmp2))

Output is:

['one', 'two', 'three'] 
3
('one', 'two', 'three')
23

As you can see, the format is different. Obviously, the list of strings is internally converted into one string with quotes. What ist the reason and how can I avoid it? For my script I would like to have a list of strings for further processing.

Answer 1

@tjt263, it's very long time ago, but I think I solved it like

    fdupesSV.set(fdupesList)
    tmp = subprocess.run(['fdupes', '-r',directory.get()], stdout=subprocess.PIPE)

    #first convert bytes to ascii, then split at '\n', then assign so fdupesOut
    fdupesList=tmp.stdout.decode('ascii').split('\n')
    fdupesSV.set(fdupesList)

I am not sure if I remember the issue correctly but I hope it helps you

Cheers Jens

Answer 2

from tkinter import *
import ast

root = Tk()
strVar = StringVar()
tmp1 = ['one','two','three']
print(type(tmp1), tmp1, len(tmp1))

strVar.set(tmp1)
x = ast.literal_eval('[' + strVar.get()[1:-1] + ']')
print(type(x), x, len(x))