I need to further optimize my code in Python.
I was earlier executing commands on the Device Under Test step by step which was a lot as I also required sleep timers. However I was able to minimize it through a list and calling elements of the list in a for loop:
I need your inputs to further optimize this code:
ConfigListBFD = ['conf t' , 'int Fa1/0' , 'ip address 10.10.10.1 255.255.255.0', 'no shut']
for i in ConfigListBFD:
tn.write(i.encode('ascii') + b"\n")
print (i, "command entered successfully")
time.sleep(2)
Please note: I am telnetting the DUT as ssh is not supported.
i am using this optimized common code for telnet. we can create a common file where you can add this method
import telnetlib
import time
def telnet(host):
user = <username>
password = <password>
try :
tn = telnetlib.Telnet(host)
except :
print("Unable to connect")
sys.exit()
tn.read_until(b"Username:") # read until username prompt
tn.write(user.encode('ascii') + b"\n")
if password:
tn.read_until(b"password:") #read until password prompt
tn.write(password.encode('ascii') + b"\n")
tn.read_until(b"#")
return tn #return telnetlib handle
than import this method to another file, where we write our script
Related
I would like to be able to telnet, input login and password credentials and then execute commands once connected but my code seems to not continue after password is entered.
import getpass
import telnetlib
HOST = "172.25.1.1"
user = input("Enter your remote account: ")
password = getpass.getpass()
tn = telnetlib.Telnet(HOST)
tn.read_until(b"login: ")
tn.write(user.encode('utf-8') + "\n")
if password:
tn.read_until(b"Password: ")
tn.write(password.encode('utf-8') + "\n")
tn.write(b"command to be issued")
print(tn.read_all())
with this code I want to telnet, input login credentials, input password, and once connected issue a command
Looks like the problem was a timing issue, I needed to import time and add time.sleep(2) after issuing the command before print(tn.read_all()).
This question is related to this other one: How to use sockets to send user and password to a devboard using ssh
I want to connect to the devboard in order to execute a script. All the outputs of that script I want to send to a Elasticsearch machine.
I can connect to the devboard (see IMAGE below) using my laptop which happens to have Elasticsearch installed. But, when I want to send data to the devboard, the script shows nothing.
What I am doing is:
As soon as you find mendel#undefined-eft:~$ , send the command: cd coral/tflite/python/examples/classification/Auto_benchmark\n
What am I doing wrong?
import paramiko
import os
#Server's data
IP = '172.16.2.47'
PORT = 22
USER = 'mendel'
PASSWORD = 'mendel'
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(hostname = IP, port=PORT, username = USER, password = PASSWORD)
channel = ssh.invoke_shell() #to get a dedicated channel
channel_data = str()
host = str()
while True:
if channel.recv_ready(): #is there data to be read?
channel_data += channel.recv(9999).decode("utf-8")
os.system('clear')
print(channel_data)
#ONLY WORKS UNTIL HERE!!!
else:
continue
if channel_data.endswith('mendel#undefined-eft:~$'):
channel.send('cd coral/tflite/python/examples/classification/Auto_benchmark\n')
channel_data += channel.recv(9999).decode("utf-8")
print(channel_data)
IMAGE
EDIT
channel = ssh.invoke_shell() #to get a dedicated channel
channel_data = str()
host = str()
while True:
if channel.recv_ready(): #is there data to be read?
channel_data += channel.recv(9999).decode("utf-8")
os.system('clear')
print(channel_data)
else:
continue
if channel_data.endswith('mendel#undefined-eft:~$ '):#it is good to send commands
channel.send('cd coral/tflite/python/examples/classification/Auto_benchmark\n')
#channel_data += channel.recv(9999).decode("utf-8")
#print(channel_data)
elif channel_data.endswith('mendel#undefined-eft:~/coral/tflite/python/examples/classification/Auto_benchmark$ '):
channel.send('ls -l\n') #python3 auto_benchmark.py')
channel_data += channel.recv(9999).decode("utf-8")
print(channel_data)
I guess you have to change the
if channel_data.endswith('mendel#undefined-eft:~$'):
to
if channel_data.endswith('mendel#undefined-eft:~$ '):
according to your prompt. Please note the space after :~$
This question already has answers here:
Execute multiple dependent commands individually with Paramiko and find out when each command finishes
(1 answer)
Executing command using "su -l" in SSH using Python
(1 answer)
Closed 5 days ago.
I wanted to wait the given command execution has been completed on remote machines. this case it just executed and return and not waiting till its completed.
import paramiko
import re
import time
def scp_switch(host, username, PasswdValue):
ssh = paramiko.SSHClient()
try:
# Logging into remote host as my credentials
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(host, username=username, password=PasswdValue ,timeout=30)
try:
# switcing to powerbroker/root mode
command = "pbrun xyz -u root\n"
channel = ssh.invoke_shell()
channel.send(command)
time.sleep(3)
while not re.search('Password',str(channel.recv(9999), 'utf-8')):
time.sleep(1)
print('Waiting...')
channel.send("%s\n" % PasswdValue)
time.sleep(3)
#Executing the command on remote host with root (post logged as root)
# I dont have any specific keyword to search in given output hence I am not using while loop here.
cmd = "/tmp/slp.sh cool >/tmp/slp_log.txt \n"
print('Executing %s' %cmd)
channel.send(cmd) # its not waiting here till the process completed,
time.sleep(3)
res = str(channel.recv(1024), 'utf-8')
print(res)
print('process completed')
except Exception as e:
print('Error while switching:', str(e))
except Exception as e:
print('Error while SSH : %s' % (str(e)))
ssh.close()
""" Provide the host and credentials here """
HOST = 'abcd.us.domain.com'
username = 'heyboy'
password = 'passcode'
scp_switch(HOST, username, password)
As per my research, it will not return any status code, is there any logic to get the return code and wait till the process completed?
I know this is an old post, but leaving this here in case someone has the same problem.
You can use an echo that will run in case your command executes successfully, for example if you are doing an scp ... && echo 'transfer complete', then you can catch this output with a loop
while True:
s = chan.recv(4096)
s = s.decode()
if 'transfer done' in s:
break
time.sleep(1)
I want to control on python
try catch wifi list and connect to catching wife name and password
but I use linux command so I can't care linux error window
I want to check password in python
when i set wrong password, open Network manager.
What should i do?
import commands
def space_filter(x):
if x == ' ':
pass
else:
return x
#fail, output = commands.getstatusoutput("nmcli dev wifi list")
test= commands.getoutput("nmcli dev wifi list")
test1=test.split(' ')
print test
print test1
test2 = []
test1 = list(filter(space_filter, test1))
#print test1
for x in range(len(test1)):
if test1[x] == '\n*' or test1[x] =='\n':
test2.append(test1[x+1])
#print test2
try:
result = commands.getoutput("nmcli d wifi connect " + test2[0] + " password 1234")
print result
except:
print "password is wrong"[enter image description here][1]
Exceptions are a language specific construct to catch abnormal/error situations. The correct way to check error conditions in shell commands is the return value.
Use the getstatusoutput function in commands module to catch the return value along with the output. In your case, you would need to parse the output along with the return code to get the reason for failure since nmcli only distinguishes between certain kinds of failure. - https://developer.gnome.org/NetworkManager/stable/nmcli.html
(status, output) = commands. getstatusoutput("nmcli d wifi connect " + test2[0] + " password 1234")
if not status:
print "error"
I need to get a connection to a device via TELNET and write in to telnet session.
I Use - Python 3.3.2 and PyDev For Eclipse 2.7.5
I use IP2COM cause it allows me to open another telnet to the same device and see how the commands are executed.
The main purpose of this is to Read\Write in to Telnet session using Python.
Here is the code that i use:
import getpass
import sys
import telnetlib
HOST = "172.17.174.50"
port = "1003"
#user = input("Enter your remote account: ")
#password = getpass.getpass()
tn = telnetlib.Telnet(HOST, port)
#tn.read_until("user:")
#tn.write(user.encode('ascii') + b"\r")
#tn.write(user.encode("test" + "\r")
#if password:
# tn.read_until(b"Password: ")
# tn.write(password.encode('ascii') + b"\n")
tn.write("sh run" + "\r")
tn.write("exit" + "\r")
print(tn.read_all()
Here is the error that i'm getting :
File "C:\Users\user\workspace\main\src\telnet.py", line 23
^
SyntaxError: unexpected EOF while parsing
The strange thing is that i have only 22 lines.. line number 23 is empty...
Can someone help me with that?
Thanks.
A parenthesis is missing in the last line.
print(tn.read_all())
print(tn.read_all().decode('ascii'))
Try this.