Python Tkinter: Creating checkbuttons from a list - python-3.x

Question

I am building a gui in tkinter with a list task_list = [].
Tasks are appended to/deleted from the list in the gui.
I want a window with checkboxes for every item in the list.
So if there's 10 items in the list, there should also be 10 checkboxes.
If there's 5 items in the list, there should be 5 corresponding checkboxes.
Can this be done?
I can't find anything on it
Thanks!

Answer 1

Here.
from tkinter import *
task_list=["Call","Work","Help"]
root=Tk()
Label(root,text="My Tasks").place(x=5,y=0)
placement=20
for tasks in task_list:
Checkbutton(root,text=str(tasks)).place(x=5,y=placement)
placement+=20
root.mainloop()
Using grid.
from tkinter import *
task_list=["Call","Work","Help"]
root=Tk()
Label(root,text="My Tasks").grid(row=0,column=0)
placement=3
for tasks in task_list:
Checkbutton(root,text=str(tasks)).grid(row=placement,column=0,sticky="w")
placement+=3
root.mainloop()

Answer 2

Here is my code for this issue:
from tkinter import Tk, Checkbutton, IntVar, Frame, Label
from functools import partial
task_list = ['Task 1', 'Task 2', 'Task 3', 'Work', 'Study']
def choose(index, task):
print(f'Selected task: {task}' if var_list[index].get() == 1 else f'Unselected task: {task}')
root = Tk()
Label(root, text='Tasks').grid(column=0, row=0)
frame = Frame(root)
frame.grid(column=0, row=1)
var_list = []
for index, task in enumerate(task_list):
var_list.append(IntVar(value=0))
Checkbutton(frame, variable=var_list[index],
text=task, command=partial(choose, index, task)).pack()
root.mainloop()
First I would like to mention that it is possible to mix layout manager methods like in this example. The main window uses grid as layout management method and I have gridded a frame to the window, but notice that Checkbuttons are getting packed, that is because frame is a different container so it is possible to use a different layout manager, which in this case makes it easier because pack just puts those checkbuttons one after another.
The other stuff:
There is the task list which would contain the tasks.
Then I have defined a function choose() this function prints out something. It depends on a variable. The comparison happens like this: print out this if value is this else print out this. It is just an if/else statement in one line and all it checks is if the IntVar in that list in that specific index is value 1 so "on". And there are two argument this function takes in: index and task. The index is meant to get the according IntVar from the var_list and the task is meant to display what tasks was chosen or unchosen.
Then the simple root = Tk() and root.mainloop() at the end.
Then is the label that just explains it.
Then the frame and here You can see that both label and frame were gridded using .grid()
Then the var_list = [] just creates an empty list.
Then comes the loop:
It loops over each item in the task_list and extracts the index of that item in the list and the value itself. This is done by using enumerate() function.
Each iteration appends a IntVar(value=0) to the var_list and since this appending happens at the same time as the items are read from the task_list the index of that IntVar in the list is the same as the current item in the task_list so that same index can be used for access.
Then a Checkbutton is created, its master is the frame (so that .pack() can be used) and the text=task so it corresponds to task name, the variable is set as a specific item in the var_list by index and this all has to be done so that a reference to that IntVar is kept. Then comes command=partial(choose, index, task) which may seem confusing but all partial does is basically this function will now execute always with the variables just given so those variables will always be the same for this function for this Checkbutton. And the first argument of partial is the function to be executed and next are arguments this function takes in. Then the Checkbutton gets packed.
If You have any questions ask.
Useful sources:
About partial() (though there are other sources too)
About Checkbutton (other sources about this too)
One line if/else statements