#!/usr/bin/python

from paramiko import SSHClient
import paramiko

    class SSH:
            def __init__(self):
                self.ssh = SSHClient()
                self.ssh.load_system_host_keys()
                self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
                self.ssh.connect(hostname='blhp0032.locaweb.com.br',username='Administrator',password='SenhaServidor')

            def exec_cmd(self,cmd):
                stdin,stdout,stderr = self.ssh.exec_command(cmd)
                if stderr.channel.recv_exit_status() != 0:
                    print stderr.read()
                else:
                    print stdout.read()

    if __name__ == '__main__':
        ssh = SSH()
        ssh.exec_cmd("update image force http://firmware.tecnologia.ws/firmware/hpoa485.bin")

#!/usr/bin/python

from paramiko import SSHClient
import paramiko
import sys

    class SSH:
        def processar(ip):

            def __init__(self):
                self.ssh = SSHClient()
                self.ssh.load_system_host_keys()
                self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
                self.ssh.connect(hostname=ip,username='Administrator',password='SenhaServidor')

            def exec_cmd(self,cmd):
                stdin,stdout,stderr = self.ssh.exec_command(cmd)
                if stderr.channel.recv_exit_status() != 0:
                    print stderr.read()
                else:
                    print stdout.read()

    if __name__ == '__main__':
        ssh = SSH()
        ssh.exec_cmd("update image force http://firmware.tecnologia.ws/firmware/hpoa485.bin")


        if __name__ == "__main__":
            for ip in sys.argv[1:]:
                processar(ip)

Traceback (most recent call last):
  File "update_oa_teste.py", line 24, in <module>
    ssh.exec_cmd("update image force http://firmware.tecnologia.ws/firmware/hpoa485.bin")
AttributeError: SSH instance has no attribute 'exec_cmd'