import pexpect
import getpass
import sys

def ssh(username,password,host,port,command,writeline):
    child = pexpect.spawn("ssh -p {} {}@{} '{}'".format(port,username,host,command))
    child.expect("password: ")
    child.sendline(password)
    if(writeline):
        print(child.read())

def scp(username,password,host,port,file,dest):
    child = pexpect.spawn("scp -P {} {} {}@{}:{}".format(port,file,username,host,dest))
    child.expect("password: ")
    child.sendline(password)

try:
    filename = sys.argv[1]
    print("=== sendhw remote commander ===")
    username = input("Username: ")
    password = getpass.getpass("Password: ")
    ssh(username,password,"some.host.net","22","mkdir ~/srakrnSRV",False)
    scp(username,password,"some.host.net","22",filename,"~/srakrnSRV")
    ssh(username,password,"some.host.net","22","cd srakrnSRV && sendhw {}".format(filename),True)

except IndexError:
    print("No homework name specified.")

b'rnbash: line 0: cd: srakrnSRV: No such file or directoryrn'