파이썬 버튼 눌러서 1씩 증가하게 하고 싶은데 1,2,3,4...이렇게가 아니라 1111이렇게 증가합니다.. 뭐가 잘못된건가요?

from tkinter import *

window = Tk()

l1=Label(window, text="계수기")
l1.grid(row=0, column=0)

e1=Entry(window)
e1.grid(row=0, column=1)

button_list=["증가"]

def click(key):
    global total
    total=0
    if key =="증가":
        total+=1
        e1.insert(END, total)
    else:
        total==0
        e1.insert(END, total)


for button_1 in button_list:
    def process(x=button_1):
        click(x)
    Button(window, text=button_1, command=process).grid(row=1, column=1, columnspan=2)