[Python] How can I make a button that adds one to a variable after each press? [closed]

I am trying to make a button that adds one to a variable each time it is clicked so that the variable goes up like 1, 2, 3, etc. this is what I have so far:

def main():
root = tk.Tk()
root.geometry('200x150')
# /////////////////
global count
count = 0

def txtChanger():
global count
count =+ 1
label.config(text = count)
print(count)

label = ttk.Label(root, text = '')
label.pack()

button = ttk.Button(root, text = 'click to change label', command=txtChanger)
button.pack()
# ///////////////////
root.mainloop()


when I press my button, it does change the label to 1 but it does not actually add up, the print in the txtChanger brings back 1 over and over again, what am I doing wrong?

I've tried this without 'count' being a global variable and just have the txtChanger function return 'count' and that didn't work

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