[Tkinter] output "os" in frame

[m_clayton]

finally I succeeded!
I have directed the output of the process in an external file and then open it, making sure I have read permission, with the usual built-in "open" function
then I place the code if this to someone can to be help:

import os
def lsblk():
    os.system('lsblk >outfile')
    records=open('outfile', 'r').readlines()