class myssh(paramiko.SSHClient):

    @classmethod
    @contextmanager
    def connect(cls, credentials, password=None):
        username, host = credentials.split('@')
        ssh = cls()
        try:
            super(SSH, ssh).connect(host, username=username, password=password)
            yield ssh
        finally:
            ssh.close()

with myssh.connect(user_machine, password=password) as ssh:
    stdin, stdout, stderr = ssh.exec_command(my_command)

    return_code = stdout.channel.recv_exit_status()

    out = stdout.read().decode('utf-8')
    err = stderr.read().decode('utf-8')

    if out.strip():
        print(out.strip())
    if err.strip():
        print(err.strip())

Exception ignored in: <object repr() failed>
Traceback (most recent call last):
  File "/home/baralv/.miniconda2/envs/py3/lib/python3.5/site-packages/paramiko/file.py", line 61, in __del__
  File "/home/baralv/.miniconda2/envs/py3/lib/python3.5/site-packages/paramiko/file.py", line 79, in close
  File "/home/baralv/.miniconda2/envs/py3/lib/python3.5/site-packages/paramiko/file.py", line 88, in flush
TypeError: 'NoneType' object is not callable