python报错：“TypeError: func() takes 0 positional arguments but 1 was given”

import tkinter
from tkinter import ttk
win = tkinter.Tk()
win.title("sunk")
win.geometry("400x400+200+20")
cv = tkinter.StringVar()
com = ttk.Combobox(win, )
com.pack()
# 设置下拉数据
com["value"] = ("黑龙江", "吉林", "辽宁")
com.current(0)
# 绑定事件
def func():
    print("sunc is a good man ")
    print(com.get())
    print(cv.get())
com.bind("<<ComboboxSelected>>", func)
win.mainloop()

运行结果：

当选择的时候就报错了，原因是因为没有自定义的函数没有加参数，只需要在
def func（event）加入event参数即可