tar -xzvf  pexpect-3.3.tar.gz cd pexpect-3.3 python setup install (require root)

#!/usr/bin/env pythonimport syssys.path.append(‘pexpect-3.3/build/lib‘) 

>>> import pexpect>>> dir(pexpect)[‘EOF‘, ‘ExceptionPexpect‘, ‘PY3‘, ‘TIMEOUT‘, ‘__all__‘, ‘__builtins__‘, ‘__doc__‘, ‘__file__‘, ‘__name__‘, ‘__package__‘, ‘__path__‘, ‘__revision__‘, ‘__version__‘, ‘_run‘, ‘codecs‘, ‘errno‘, ‘fcntl‘, ‘is_executable_file‘, ‘os‘, ‘pty‘, ‘re‘, ‘resource‘, ‘run‘, ‘runu‘, ‘searcher_re‘, ‘searcher_string‘, ‘select‘, ‘signal‘, ‘spawn‘, ‘spawnu‘, ‘split_command_line‘, ‘stat‘, ‘struct‘, ‘sys‘, ‘termios‘, ‘time‘, ‘traceback‘, ‘tty‘, ‘types‘, ‘which‘]

>>> print pexpect.run(‘ping localhost -c 3‘)           PING localhost (127.0.0.1) 56(84) bytes of data.64 bytes from localhost (127.0.0.1): icmp_seq=1 ttl=64 time=0.087 ms64 bytes from localhost (127.0.0.1): icmp_seq=2 ttl=64 time=0.088 ms64 bytes from localhost (127.0.0.1): icmp_seq=3 ttl=64 time=0.088 ms--- localhost ping statistics ---3 packets transmitted, 3 received, 0% packet loss, time 2002msrtt min/avg/max/mdev = 0.087/0.087/0.088/0.010 ms

import pexpect
child = pexpect.spawn(‘python‘,timeout=3)
child.expect(">>>")
child.sendline("exit()")
print child.before   # Print the result of the ls command.

fout=file(‘filename‘,‘a‘) #w write /a append
child = pexpect.spawn(‘su root‘)child.logfile = sys.stdout
child.logfile_send=fout

#!/usr/bin/python ‘‘‘this script can batch add user everytime will add specific usenameuser mumber and passwordcreate by Young 2014/08/02require pexpect module, if you don‘t have one please install this module if you can‘t install this module please add  this module path to sys.path‘‘‘import pexpectimport getoptimport osimport sysimport randomimport string# usage fuctiondef usage():    print ‘‘‘Usage: python %s  --name user --amount 100 --password [optional]or python %s  -n user -a 100 -p [optional]this will create user1~user100 and default password will be random or specific.make sure when you run this script as root -n,--name        the username you want create-a,--amount      the amount of users you want create-p,--password    the default password of use your create-h,--help        display this help and exit-v,--version     output version information and exit‘‘‘  %(sys.argv[0],sys.argv[0])# get the parameters # set the default user nameuser_name=‘user‘# generate random passworddef set_password():    word=[x for x in ‘aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ0123456789‘]    p=string.join(random.sample(word, 8)).replace(" ","")    return p# number of users ,set default users number as 10number_of_users=10password=set_password()is_ramdom_password=True#print passworddef get_command():    try:        opts, args = getopt.getopt(sys.argv[1:], "n:a:p:hv", ["name=","amount=","password=","help", "version"])    except getopt.GetoptError as err:        # print help information and exit        print str(err) # will print something like "option -a not recognized"            usage()            sys.exit(2)    #print opts,args    for option,value in opts:        #print "----------->"+option+‘ <><>‘+value            if option in ["-n","--name"]:            if(len(value)>=4):                global user_name                user_name=value            else:                print "invaild usename,will use user"        elif option in ["-a","--amount"]:            if value.isdigit():                if( int(str(value))>0 and int(str(value))< 1000 ):                    global number_of_users                    number_of_users=int(str(value))                else:                    usage()                    sys.exit(2)            else:                print "ValueError: invalid literal for ",value                print "invaild amount,will use defualt"                elif option in ["-p","--password"]:            if(len(value)>=6):                global password                password=value                    global is_ramdom_password                is_ramdom_password=False            else:                print "invaild password,will use random"        elif option in ["-v","--version"]:                    print sys.argv[0]+‘ 1.0.0‘            sys.exit(0)               elif option in ("-h", "--help"):                    usage()                    sys.exit(0)               else :            assert False, "unhandled option"            usage()            sys.exit(2)def check_root():    if( os.environ[‘USER‘]!=‘root‘):        print ‘Permission denied,please su root‘        sys.exit()#use pexpect to adduserdef run_add(user,mypassword):    log = file(‘adduser.log‘,‘a‘)    flag=os.system(‘adduser ‘+user)    if(flag!=0):        os.system(‘userdel ‘+user)        os.system(‘adduser ‘+user)    try:        child=pexpect.spawn(‘passwd ‘+user,timeout=5)        child.logfile = log        child.logfile_send=sys.stdout         child.expect("New password:")        child.sendline(mypassword)        child.expect("Retype new password:")        child.sendline(mypassword)        child.expect("passwd: all authentication tokens updated successfully.")    except pexpect.EOF:        pass    except pexpect.TIMEOUT:        pass    def add_user(name,amount,password,is_ramdom_password):    check_root()    for number in range(1,amount+1):        if(is_ramdom_password):            print "%4d: adduser %s%-4d password %s " %(number,name,number,set_password())                run_add(name+str(number),set_password())        else:            print "%4d: adduser %s%-4d password %s " %(number,name,number,password)            run_add(name+str(number),set_password)        get_command()add_user(user_name,number_of_users,password,is_ramdom_password)