How to change variables using entry with a button in tkinter?

Python Help
1

I have set up a series of entries that change the colors of a canvas object in tkinter. While the print yielded results, it did not change the colors of said object in the canvas, making me wonder what did I do wrong in calling the Chara1 and/or ChangeVar functions.

import tkinter as tk
from tkinter import ttk

root = tk.Tk()
frame = tk.Frame(root)
frame.pack()

#Name = tk.Frame(Frame)
#Name.pack(side = Side)

TabTool = tk.Frame(root)
TabTool.pack(side = tk.TOP)
Bottom = tk.Frame(root)
Bottom.pack(side = tk.BOTTOM)
RightSide = tk.Frame(Bottom)
RightSide.pack(side = tk.RIGHT)

def Label(Frame, Name, Text):
    Name = tk.Label(Frame, text = Text)
    Name.pack(side = tk.LEFT)
def GL(Frame, Text, Grid):
    tk.Label(Frame, text=Text).grid(row=Grid)
def Button(Frame, Name, Text, Image, Command, Pack):
    Name = tk.Button(Frame, text = Text, image = Image, command = Command)
    Name.pack(side = Pack)

CanvasArea = ttk.Frame(Bottom)
CanvasArea.pack(side = tk.LEFT)

CW = 300
CH = 600
LXM = (CW / 2)
LYM = (CH / 2)

GL(RightSide, "Color 1:", 0)
Color1 = tk.Entry(RightSide)
Color1.grid(row=0, column=1)
GL(RightSide, "Color 2:", 1)
Color2 = tk.Entry(RightSide)
Color2.grid(row=1, column=1)
GL(RightSide, "Color 3:", 6)
Color3 = tk.Entry(RightSide)
Color3.grid(row=6, column=1)

ACI = tk.StringVar(RightSide, '1CI', 'red')
BCI = tk.StringVar(RightSide, '2CI', 'green')
CCI = tk.StringVar(RightSide, '3CI', 'black')

MainCanvas = tk.Canvas(CanvasArea, bg = 'white', height = CH, width = CW)
MainCanvas.pack(side = tk.LEFT)

class C1:
    LX = LXM
    LY = LYM
    SX = 1
    SY = 1
    HL = 0
    SL = 0

    #None
    NP = (((-1 * SX) + LX), ((0 * SY) + LY), ((1 * SX) + LX), ((0 * SY) + LY))
    #Shapes
    A1 = (((10 * SX) + LX), ((0 * SY) + LY), ((10 * SX) + LX), ((0 * SY) + LY)), ((10 * SX) + LX), ((-10 * SY) + LY)
    A2 = (((-10 * SX) + LX), ((0 * SY) + LY), ((-10 * SX) + LX), ((0 * SY) + LY)), ((10 * SX) + LX), ((10 * SY) + LY)

def Chara1(AT, BT, CT,  MC1, MC2, MC3, LC, LT, LS)
    def Main(PI, MC, LO, LT, LS):
        MainCanvas.create_polygon(PI, fill = MC, outline = LO, width = LT, smooth = LS)

    Main(AT, MC1, LC, LT, LS)
    Main(BT, MC2, LC, LT, LS)
    Main(CT, MC3, LC, LT, LS)

Chara1(C1.A1, C1.A2, C1.NP, 1CI, 2CI, None, 3CI, 5, 0)

def ChangeVar():
    ACI = tk.StringVar(RightSide, 'ACI', Color1.get())
    BCI = tk.StringVar(RightSide, 'BCI', Color2.get())
    CCI = tk.StringVar(RightSide, 'CCI', Color3.get())
    print(ACI)
    print(BCI)
    print(CCI)

Button(Bottom , 'UC', 'UpdateColors', None, ChangeVar, tk.LEFT)

I tried using a lambda command (tk.Button(Bottom , text = 'UM', command=lambda *args: Chara1(C1.A1, C1.A2, C1.NP, ACI, BCI, None, CCI, 5, 0)).pack()) to ‘refresh’ the function call by reassigning them, but failed (no color change). What should I do?

Bonus Question: Is it possible to use the same method with the shape variables from the C1 class to change the shape in Chara1 (by changing input in the T (1T, 2T, 3T) arguments to different inputs)?

2

You cannot have a variable whose name starts with a digit, e.g. 1CI, so the code you posted won’t even run.

4

Updated the code. The point is that the variables are seemingly unchangeable in function arguments (I suggest you read my post again). Note that this is a simplification of a larger project. Please review again what’s wrong with my code.

5

I still can’t run it because of this:

Chara1(C1.A1, C1.A2, C1.NP, 1CI, 2CI, None, 3CI, 5, 0)

1CI, 2CI and 3CI are not valid variable names or literals.

Also, def Chara1(AT, BT, CT, MC1, MC2, MC3, LC, LT, LS) is missing the final :.

Edit:
You’re creating 3 instances of tk.StringVar and binding them to global variables, but not doing anything with them (none of the widgets refer to them), and then in ChangeVar you’re creating new 3 instances of tk.StringVar and binding them to local variables, but not doing anything with them either (and they’ll be garbage collected when the function returns).

6

Your code is way too long for me to read. For a working example of entry changes being validated and triggering actions, you could load Lib/idlelib/configdialog.py and look at, for instance, the class WinPage code.