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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def vsan_disable(host, username, password, protocol=None, port=None, host_names=None):
    '''
    Disable VSAN for a given host or list of host_names.

    host
        The location of the host.

    username
        The username used to login to the host, such as ``root``.

    password
        The password used to login to the host.

    protocol
        Optionally set to alternate protocol if the host is not using the default
        protocol. Default protocol is ``https``.

    port
        Optionally set to alternate port if the host is not using the default
        port. Default port is ``443``.

    host_names
        List of ESXi host names. When the host, username, and password credentials
        are provided for a vCenter Server, the host_names argument is required to
        tell vCenter which hosts should disable VSAN.

        If host_names is not provided, VSAN will be disabled for the ``host``
        location instead. This is useful for when service instance connection
        information is used for a single ESXi host.

    CLI Example:

    .. code-block:: bash

        # Used for single ESXi host connection information
        salt '*' vsphere.vsan_disable my.esxi.host root bad-password

        # Used for connecting to a vCenter Server
        salt '*' vsphere.vsan_disable my.vcenter.location root bad-password \
        host_names='[esxi-1.host.com, esxi-2.host.com]'
    '''
    service_instance = salt.utils.vmware.get_service_instance(host=host,
                                                              username=username,
                                                              password=password,
                                                              protocol=protocol,
                                                              port=port)
    # Create a VSAN Configuration Object and set the enabled attribute to True
    vsan_config = vim.vsan.host.ConfigInfo()
    vsan_config.enabled = False

    host_names = _check_hosts(service_instance, host, host_names)
    ret = {}
    for host_name in host_names:
        host_ref = _get_host_ref(service_instance, host, host_name=host_name)
        vsan_system = host_ref.configManager.vsanSystem

        # We must have a VSAN Config in place before we can manipulate it.
        if vsan_system is None:
            msg = 'VSAN System Config Manager is unset for host \'{0}\'. ' \
                  'VSAN configuration cannot be changed without a configured ' \
                  'VSAN System.'.format(host_name)
            log.debug(msg)
            ret.update({host_name: {'Error': msg}})
        else:
            try:
                # Disable vsan on the host
                task = vsan_system.UpdateVsan_Task(vsan_config)
                salt.utils.vmware.wait_for_task(task, host_name, 'Disabling VSAN', sleep_seconds=3)
            except vmodl.fault.SystemError as err:
                log.debug(err.msg)
                ret.update({host_name: {'Error': err.msg}})
                continue
            except Exception as err:
                msg = '\'vsphere.vsan_disable\' failed for host {0}: {1}'.format(host_name, err)
                log.debug(msg)
                ret.update({host_name: {'Error': msg}})
                continue

            ret.update({host_name: {'VSAN Disabled': True}})

    return ret