stdin, stdout, stderr = ssh.exec_command("date")
File "/usr/lib/python2.7/site-packages/paramiko-1.16.0-py2.7.egg/paramiko/client.py", line 404, in exec_command
File "/usr/lib/python2.7/site-packages/paramiko-1.16.0-py2.7.egg/paramiko/channel.py", line 60, in _check
File "/usr/lib/python2.7/site-packages/paramiko-1.16.0-py2.7.egg/paramiko/channel.py", line 229, in exec_command
File "/usr/lib/python2.7/site-packages/paramiko-1.16.0-py2.7.egg/paramiko/channel.py", line 1086, in _wait_for_event
paramiko.ssh_exception.SSHException: Channel closed.

import paramiko
import sys, traceback
import __builtin__

# Define variable for file inoput errors
notfound = getattr(__builtin__,"IOError","FileNotFoundError")

# Define some Variables for SSH Connection
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

# Define a list of credentials for the program to try
credentials = [['blah', 'blah'], ['blah', 'blah'], ['blah', 'blah']]

# Define function to bring IP addresses from text file into an array
def ip_get():
    try:
        ip_array = []
        with open("addresses.txt") as i:
            for line in i:
                ip = line.rstrip('rn')
                ip_array.append(ip)
    except notfound:
        print("n")
        print("Input error occured. Check input text file name and format.")
        print("n")
        sys.exit(0)
    except KeyboardInterrupt:
        print('Interrupted')
        sys.exit(0)
    except:
        print('Unknown Error')
        sys.exit(0)
    return ip_array

# Define function to SSH to IP address variable
def ssh_connect(ip):
    for elem in credentials:
        try:
            ssh.connect(ip, username=elem[0],password=elem[1])
            stdin, stdout, stderr = ssh.exec_command("sh switch")
            OUTPUT = stdout.read()
            print(OUTPUT)
            break
            close()
        except paramiko.AuthenticationException:
            print("n")
            print("Connection Failed to " + ip + " using " + elem[0])

# Call function to get the array of IP addresses
ip_array = ip_get()

# Call SSH connection function for each IP address in the array
for i in range(0, len(ip_array)):
    print('Attempting connection to the following IP addresses:')
    print ip_array[i]
    ssh_connect(ip_array[i])