rotten news relay - comp.lang.python - Can't trap paramiko runtime trace-back error

Subject: Can't trap paramiko runtime trace-back error
From: Vinode Singh Ujlain
Newsgroups: comp.lang.python
Date: Wed, 22 May 2024 07:06 UTC
References: 1

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From: ujlain@gmail.com (Vinode Singh Ujlain)
Newsgroups: comp.lang.python
Subject: Can't trap paramiko runtime trace-back error
Date: Wed, 22 May 2024 12:36:59 +0530
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When running the code below , I get error as enumerated below. Why am I
not able to trap this paramiko runtime traceback in try-except block ?

Exception (client): Error reading SSH protocol banner
Traceback (most recent call last):
File
"/home/uzi/.local/lib/python3.8/site-packages/paramiko/transport.py",
line 2327, in _check_banner
    buf = self.packetizer.readline(timeout)
File
"/home/uzi/.local/lib/python3.8/site-packages/paramiko/packet.py", line
381, in readline
    buf += self._read_timeout(timeout)
File
"/home/uzi/.local/lib/python3.8/site-packages/paramiko/packet.py", line
626, in _read_timeout
    raise socket.timeout()
socket.timeout

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File
"/home/uzi/.local/lib/python3.8/site-packages/paramiko/transport.py",
line 2143, in run
self._check_banner()
File
"/home/uzi/.local/lib/python3.8/site-packages/paramiko/transport.py",
line 2331, in _check_banner
raise SSHException(
paramiko.ssh_exception.SSHException: Error reading SSH protocol banner

SSH error: No existing session

importparamiko
importtime
defexecute():
try:
# Define the server and credentials
ip='p.q.r.s'
un, up, po='name', "passwd", 22
bto, sto=60, 60
ssh_client=paramiko.SSHClient()
ssh_client.load_system_host_keys()
ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh_client.connect(hostname=ip, port=po, username=un, password=up,
banner_timeout=bto, timeout=sto)
shell=ssh_client.invoke_shell()
defsend_command(command, wait_time=1):
shell.send(command+'\n')
time.sleep(wait_time) # Give the command some time to execute
whilenotshell.recv_ready():
time.sleep(0.1)
returnshell.recv(8192).decode()
output=send_command('date')
print("Output:\n", output)
delssh_client
exceptparamiko.SSHExceptionase:
print(f"SSH error: {e}")
exceptExceptionase:
print(f"Error: {e}")
finally:
# Close the SSH client connection
delssh_client
execute()

--
Warm Regards,
Vinode Singh Ujlain | https://www.linkedin.com/in/ujlain/
------------------------------------------------------------------------

Subject	Author
Can't trap paramiko runtime trace-back error	Vinode Singh Ujlain

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comp / comp.lang.python / Can't trap paramiko runtime trace-back error