Fabric

hi,

i use fabric version 1.0a.

after a network.disconnect_all() the connections cache is not empty. if you call run (or something similar) again it is raise an exception:

@needs_host
def run(command, shell=True, pty=False):
    """
    Run a shell command on a remote host.

    If ``shell`` is True (the default), `run` will execute the given command
    string via a shell interpreter, the value of which may be controlled by
    setting ``env.shell`` (defaulting to something similar to ``/bin/bash -l -c
    "<command>"``.) Any double-quote (``"``) or dollar-sign (``$``) characters
    in ``command`` will be automatically escaped when ``shell`` is True.

    `run` will return the result of the remote program's stdout as a single
    (likely multiline) string. This string will exhibit ``failed`` and
    ``succeeded`` boolean attributes specifying whether the command failed or
    succeeded, and will also include the return code as the ``return_code``
    attribute.

    Standard error will also be attached, as a string, to this return value as
    the ``stderr`` attribute.

    You may pass ``pty=True`` to force allocation of a pseudo tty on
    the remote end. This is not normally required, but some programs may
    complain (or, even more rarely, refuse to run) if a tty is not present.

    Examples::

        run("ls /var/www/")
        run("ls /home/myuser", shell=False)
        output = run('ls /var/www/site1')

    .. versionchanged:: 1.0
        Added the ``succeeded`` attribute.
    .. versionchanged:: 1.0
        Added the ``stderr`` attribute.
    """


  return _run_command(command, shell, pty)


/usr/local/lib/python2.6/dist-packages/Fabric-1.0a-py2.6.egg/fabric/operations.py:567:



command = ‘cat /etc/deskcloudclient/config.cfg’, shell = True, pty = False
sudo = False, user = None

def _run_command(command, shell=True, pty=False, sudo=False, user=None):
    """
    Underpinnings of `run` and `sudo`. See their docstrings for more info.
    """
    # Set up new var so original argument can be displayed verbatim later.
    given_command = command
    # Handle context manager modifications, and shell wrapping
    wrapped_command = _shell_wrap(
        _prefix_commands(_prefix_env_vars(command)),
        shell,
        _sudo_prefix(user) if sudo else None
    )
    which = 'sudo' if sudo else 'run'
    if output.debug:
        print("[%s] %s: %s" % (env.host_string, which, wrapped_command))
    elif output.running:
        print("[%s] %s: %s" % (env.host_string, which, given_command))


  channel = connections[env.host_string]._transport.open_session()


E       AttributeError: ‘NoneType’ object has no attribute ‘open_session’

/usr/local/lib/python2.6/dist-packages/Fabric-1.0a-py2.6.egg/fabric/operations.py:484: AttributeError