unsupported operand type(s) for +: 'instance' and 'int'

[imhomer]

Hi:
I tried to make two buttons that when I click it, the text in the label will increase or decrease. But python told me that "unsupported operand type(s) for +: 'instance' and 'int'" on "labeltext1.set(labeltext1 + 1)" and "labeltext1.set(labeltext1 - 1)". Could you help me solve it? Thanks very much!!

def Increase(labeltext1):
    for a in range (0, 100): 
        labeltext1.set(labeltext1 + 1)
 
def Decrease(labeltext1):
    for a in range (0, 100):
        labeltext1.set(labeltext1 - 1)
 
labeltext1 = IntVar()
labeltext1.set(0)
 
NumberLabel = Label(root, textvariable = labeltext1)
Button2 = Button(root, text = "Increase")
Button3 = Button(root, text = "Decrease")
 
NumberLabel.grid(row = 1, column = 0)
Button2.grid(row = 5, column = 0)
Button3.grid(row = 6, column = 0)
 
Button2.bind("<Button-1>", Increase(labeltext1))
Button3.bind("<Button-1>", Decrease(labeltext1))
 

[bvdet]

To determine the current value of the label text, use the get() method.

def Increase(labeltext1):
    for a in range (0, 100): 
        labeltext1.set(labeltext1.get() + 1)