def tunnel_to_kernel(connection_info, sshserver, sshkey=None):
    """tunnel connections to a kernel via ssh
    
    This will open four SSH tunnels from localhost on this machine to the
    ports associated with the kernel.  They can be either direct
    localhost-localhost tunnels, or if an intermediate server is necessary,
    the kernel must be listening on a public IP.
    
    Parameters
    ----------
    connection_info : dict or str (path)
        Either a connection dict, or the path to a JSON connection file
    sshserver : str
        The ssh sever to use to tunnel to the kernel. Can be a full
        `user@server:port` string. ssh config aliases are respected.
    sshkey : str [optional]
        Path to file containing ssh key to use for authentication.
        Only necessary if your ssh config does not already associate
        a keyfile with the host.
    
    Returns
    -------
    
    (shell, iopub, stdin, hb) : ints
        The four ports on localhost that have been forwarded to the kernel.
    """
    if isinstance(connection_info, basestring):
        # it's a path, unpack it
        with open(connection_info) as f:
            connection_info = json.loads(f.read())
    
    cf = connection_info
    
    lports = tunnel.select_random_ports(4)
    rports = cf['shell_port'], cf['iopub_port'], cf['stdin_port'], cf['hb_port']
    
    remote_ip = cf['ip']
    
    if tunnel.try_passwordless_ssh(sshserver, sshkey):
        password=False
    else:
        password = getpass("SSH Password for %s: "%sshserver)
    
    for lp,rp in zip(lports, rports):
        tunnel.ssh_tunnel(lp, rp, sshserver, remote_ip, sshkey, password)
    
    return tuple(lports)
def tunnel_to_kernel(connection_info, sshserver, sshkey=None):
    """tunnel connections to a kernel via ssh
    
    This will open four SSH tunnels from localhost on this machine to the
    ports associated with the kernel.  They can be either direct
    localhost-localhost tunnels, or if an intermediate server is necessary,
    the kernel must be listening on a public IP.
    
    Parameters
    ----------
    connection_info : dict or str (path)
        Either a connection dict, or the path to a JSON connection file
    sshserver : str
        The ssh sever to use to tunnel to the kernel. Can be a full
        `user@server:port` string. ssh config aliases are respected.
    sshkey : str [optional]
        Path to file containing ssh key to use for authentication.
        Only necessary if your ssh config does not already associate
        a keyfile with the host.
    
    Returns
    -------
    
    (shell, iopub, stdin, hb) : ints
        The four ports on localhost that have been forwarded to the kernel.
    """
    if isinstance(connection_info, basestring):
        # it's a path, unpack it
        with open(connection_info) as f:
            connection_info = json.loads(f.read())
    
    cf = connection_info
    
    lports = tunnel.select_random_ports(4)
    rports = cf['shell_port'], cf['iopub_port'], cf['stdin_port'], cf['hb_port']
    
    remote_ip = cf['ip']
    
    if tunnel.try_passwordless_ssh(sshserver, sshkey):
        password=False
    else:
        password = getpass("SSH Password for %s: "%sshserver)
    
    for lp,rp in zip(lports, rports):
        tunnel.ssh_tunnel(lp, rp, sshserver, remote_ip, sshkey, password)
    
    return tuple(lports)
def tunnel_to_kernel ( connection_info , sshserver , sshkey = None ) : if isinstance ( connection_info , basestring ) : # it's a path, unpack it with open ( connection_info ) as f : connection_info = json . loads ( f . read ( ) ) cf = connection_info lports = tunnel . select_random_ports ( 4 ) rports = cf [ 'shell_port' ] , cf [ 'iopub_port' ] , cf [ 'stdin_port' ] , cf [ 'hb_port' ] remote_ip = cf [ 'ip' ] if tunnel . try_passwordless_ssh ( sshserver , sshkey ) : password = False else : password = getpass ( "SSH Password for %s: " % sshserver ) for lp , rp in zip ( lports , rports ) : tunnel . ssh_tunnel ( lp , rp , sshserver , remote_ip , sshkey , password ) return tuple ( lports )
tunnel connections to a kernel via ssh
    
    This will open four SSH tunnels from localhost on this machine to the
    ports associated with the kernel.  They can be either direct
    localhost-localhost tunnels, or if an intermediate server is necessary,
    the kernel must be listening on a public IP.
    
    Parameters
    ----------
    connection_info : dict or str (path)
        Either a connection dict, or the path to a JSON connection file
    sshserver : str
        The ssh sever to use to tunnel to the kernel. Can be a full
        `user@server:port` string. ssh config aliases are respected.
    sshkey : str [optional]
        Path to file containing ssh key to use for authentication.
        Only necessary if your ssh config does not already associate
        a keyfile with the host.
    
    Returns
    -------
    
    (shell, iopub, stdin, hb) : ints
        The four ports on localhost that have been forwarded to the kernel.
tunnel connections to a kernel via ssh This will open four SSH tunnels from localhost on this machine to the ports associated with the kernel . They can be either direct localhost - localhost tunnels or if an intermediate server is necessary the kernel must be listening on a public IP . Parameters ---------- connection_info : dict or str ( path ) Either a connection dict or the path to a JSON connection file sshserver : str The ssh sever to use to tunnel to the kernel . Can be a full user