py script error

#!/usr/bin/python
#Coded By me
#Cateva librarii
from multiprocessing import Process
import sys
import paramiko
file = open(str(sys.argv[1]),'a+')
paramiko.util.log_to_file("log.txt")


#Definim conexiune in paramiko
def ssh_connect(host,user,passwd):
	try:

		ssh=paramiko.SSHClient()

		ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

		ssh.connect(host,port = 22,username = user ,password = passwd ,timeout = 10)

		stdin,stdout,stderr = ssh.exec_command("uname -a")

		version = stdout.read()

		ssh.close()
		ver = "[+][%s:%s:%s:%s]"% (ip,user,passwd,version)
		if "Linux" in ver:
			print ver
			check = open("check.txt","a").write(ver)
	except:
		pass

#definim Threderul infinit
for line in file:


	target_root = line.split(":")
	ip = target_root[0]
	user_name = target_root[1]
	pass_target = target_root[2].strip()
	thread = Process(target=ssh_connect , args=(ip,user_name,pass_target,))
	thread.start()

print("Done!")