Creating a function interrupt button tkinter

[AnotherSam]

Hello,
Thanks so much for your time and help. I had a follow up if you don't mind.

from tkinter import Button, Tk
  
class Sweep:
    def __init__(self, root, value_List, delay=1000):
        self.root = root
        self.value_List= value_List
        self.delay = delay
        self.running = False
        self.end_value = len(self.value_List)
        self.num = 0
 
    def start(self):
        print("Start method called")
        if not self.running:
            self.running = True
            self._loop()
 
    def stop(self):
        print("Stop method called")
        if self.running:
            self.num = 0
            self.running = False
 
    def _loop(self):
        if self.running:
            if self.end_value is not None and self.end_value <= self.num:
                self.running = False
                print("The End")
                self.num=0
                return
            print(self.value_List[self.num])
            self.num += 1
            self.root.after(self.delay, self._loop)
 
def CreateList(start, stop, numPts):
    SweepList=[]
    SweepList.append(start)
    stepInterval = (stop-start)/(numPts-1)
    for x in range(1,numPts):
        SweepList.append(start + x*stepInterval)
    return SweepList

    
win = Tk()

numList = CreateList(1000,10000,10)
sweep = Sweep(win, numList, 1000)
 
init_button = Button(win, text="Start", command=sweep.start)
init_button.grid(row=0, column=1, pady=20, padx=10)
 
pause_button = Button(win, text="Stop", command=sweep.stop)
pause_button.grid(row=0, column=2, pady=20, padx=10)
 
quit_button = Button(win, text="Quit", command=win.destroy)
quit_button.grid(row=1, column=0, columnspan=3, pady=20, padx=10)
 
win.mainloop()

In my real application I am running this sweep function within a separate function which is called after a button push. I'll better illustrate in a moment. However, working in baby steps. The code above modifies your original class to contain the list to be swept through, and the _loop function to step through self.value_List. In this case I understand the button's commands are well defined because the class is initialized in the main loop.
The code below puts the class definition and list creaction in a separate function outside the main loop, RunSweep. I have the pause button commented out because it returns an error, and rightfully so, that sweep isn't defined. Is there a way to modify that function call to include the class as one of the arguments instead of using sweep.Function? Perhaps have a new button pup up when that function is running and sweep is defined?

from tkinter import Button, Tk
  
class Sweep:
    def __init__(self, root, value_List, delay=1000):
        self.root = root
        self.value_List= value_List
        self.delay = delay
        self.running = False
        self.end_value = len(self.value_List)
        self.num = 0
 
    def start(self):
        print("Start method called")
        if not self.running:
            self.running = True
            self._loop()
 
    def stop(self):
        print("Stop method called")
        if self.running:
            self.num = 0
            self.running = False
 
    def _loop(self):
        if self.running:
            if self.end_value is not None and self.end_value <= self.num:
                self.running = False
                print("The End")
                self.num=0
                return
            print(self.value_List[self.num])
            self.num += 1
            self.root.after(self.delay, self._loop)
 
def CreateList(start, stop, numPts):
    SweepList=[]
    SweepList.append(start)
    stepInterval = (stop-start)/(numPts-1)
    for x in range(1,numPts):
        SweepList.append(start + x*stepInterval)
    return SweepList

def RunSweep(start,stop,numPts,delay):
    numList = CreateList(start,stop,numPts)
    sweep = Sweep(win, numList, delay)
    sweep.start()

    
win = Tk()

init_button = Button(win, text="Start", command=lambda:RunSweep(1000,10000,10,1000))
init_button.grid(row=0, column=1, pady=20, padx=10)
 
#pause_button = Button(win, text="Stop", command=sweep.stop)
#pause_button.grid(row=0, column=2, pady=20, padx=10)
 
quit_button = Button(win, text="Quit", command=win.destroy)
quit_button.grid(row=1, column=0, columnspan=3, pady=20, padx=10)
 
win.mainloop()