Typeerror: expected str, bytes or os.pathlike object, not entry

misi mas/mbak, saya punya masalah jadi gini saya kan nyoba untuk membuat sshclient dengan menggunakan module di bawah, dan dengan tambahan sedikit GUI memakai Tkinter 8.6 dan python saya python 3.6, saya RUN itu dia bisa/jalan muncul GUInya cuman kok pas saya udah isi semuanya, ada bacaan seperti ini ya?

Traceback (most recent call last):
  File "client.py", line 72, in <module>
    subSSH()
  File "client.py", line 11, in subSSH
    stderr=subprocess.PIPE)
  File "/usr/lib/python3.6/subprocess.py", line 709, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.6/subprocess.py", line 1275, in _execute_child
    restore_signals, start_new_session, preexec_fn)
TypeError: expected str, bytes or os.PathLike object, not Entry

saya sudah mencari-cari masalahnya dan belum ketemu :3

berikut contoh kode saya di bawah

import subprocess
import sys
from tkinter import *

def subSSH():
	ssh = subprocess.Popen(["ssh", "%s" % adr, user, passw, port_number],
		                      shell=False,
		                      stdout=subprocess.PIPE,
		                      stderr=subprocess.PIPE)
	result = ssh.stdout.readlines()
	if result == []:
		   error = ssh.stderr.readlines()
		   print >>sys.stderr, "ERROR: %s" % error
	else:
		print (result)

window = Tk()
window.geometry("400x308")
window.resizable(0,0)

frame = Frame(window, bd=2)
frame.grid(column=1, row=1)

		########### USERNAME ##############
username = Label(frame, text="Username", fg="#30336b")
username.grid(column=2, row=3)

user = Entry(frame)
user.grid(column=2, row=4)

		######### PASSWORD ###############3

password = Label(frame, text="Password", fg="#30336b")
password.grid(column=3, row=3)

passw = Entry(frame, show="*")
passw.grid(column=3, row=4)

		########## IP ADDRESS #############

ip = Label(frame, text="Ip Address", fg="#30336b")
ip.grid(column=2, row=5)

adr = Entry(frame)
adr.grid(column=2, row=6)

		########## PORT NUMBER ################

port = Label(frame, text="Port Number", fg="#30336b")
port.grid(column=3, row=5)

port_number = Entry(frame)
port_number.grid(column=3, row=6)

		#####################################################

ok = Button(frame, text="Connect", command=subSSH)
ok.grid(column=3, row=10)

cancel = Button(frame, text="Cancel", command=quit)
cancel.grid(column=2, row=10)

window.title("Client Login")

window.mainloop()
if __name__ == "__main__":
	subSSH()

sebelumnya terimakasih