paramiko-expect timeout is happening after executing the command

Can someone help me why timeout is happening after executing the command .I am trying to SSH to a machine and execute a command.I want to store the result of the executed command . I have referred paramiko-timeout but i didn't get my expected result.

import traceback

try:
import paramiko
except ImportError:
raise Exception("Please install paramiko , pip install paramiko")
import pexpect
from paramiko_expect import SSHClientInteraction


def main():
HOSTNAME = "minion5.net"
USERNAME = "root"
PASSWORD = "help@432"
PROMPT = "root@*:~$s+"
try:
client = paramiko.SSHClient()
client.load_system_host_keys()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(hostname=HOSTNAME, username=USERNAME, password=PASSWORD)

with SSHClientInteraction(client, timeout=20, display=True) as interact:
interact.expect(PROMPT)
interact.send('hostname -f')
interact.expect(PROMPT)
interact.send('exit')
cmd_output = interact.current_output_clean
print cmd_output
except Exception:
traceback.print_exc()
finally:
try:
client.close()
except:
pass


if __name__ == '__main__':
main()


following is the output

[root@btpvm0740 paramiko-tests]# python sa-test.py
Last login: Thu Jun 14 11:13:10 2018 from btpvm0740.net
[root@minion5 ~]# Traceback (most recent call last):
File "sa-test.py", line 25, in main
interact.expect(PROMPT)
File "/usr/lib/python2.7/site-packages/paramiko_expect.py", line 144, in expect
current_buffer = self.channel.recv(self.buffer_size)
File "/usr/lib/python2.7/site-packages/paramiko/channel.py", line 685, in recv
raise socket.timeout()
timeout


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