#tk-button
#python3
from tkinter import *
er = Tk()
er.title("tk-button")
er.geometry('500x400')
def printhello():
t.insert('2.1', "hello\n")
def printpress():
t.insert('1.0', "press\n")
## print(t)
## t.insert('2.0', "hello\n")
t = Text()
print(t)
t.pack()
Button(er, text = 'hello', command = printhello).pack(side = LEFT)
Button(er, text = 'press', command = printpress).pack(side = LEFT)
er.mainloop()
python的insert函数中有两个必填参数，第一个是填充的位置，第二个是填充的内容。必须有小数点，不然报错。一般用1.0，就是往下面一行行的写
