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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 block(bdaddr):
    '''
    Block a specific bluetooth device by BD Address

    CLI Example:

    .. code-block:: bash

        salt '*' bluetooth.block DE:AD:BE:EF:CA:FE
    '''
    if not salt.utils.validate.net.mac(bdaddr):
        raise CommandExecutionError(
            'Invalid BD address passed to bluetooth.block'
        )

    cmd = 'hciconfig {0} block'.format(bdaddr)
    __salt__['cmd.run'](cmd).splitlines()