오류가 나서 확인부탁드려요 저는 못잡겠어요 ㅠㅠ

from tkinter import *

def printHello() :

print('hi')

root = Tk()

w = Label(root, text="pytion test")

b = button(root, text="hello python", command=printHello)

c = button(root, text="Quit",command=root.quit)

w.pack()

b.pack()

c.pack()

root.mainloop()

Traceback (most recent call last):

File "C:section2test1.py", line 10, in

b = button(root, text="hello python", command=printHello)

NameError: name 'button' is not defined

[Finished in 0.245s]