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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 _nodetool(cmd):
    '''
    Internal cassandra nodetool wrapper. Some functions are not
    available via pycassa so we must rely on nodetool.
    '''
    nodetool = __salt__['config.option']('cassandra.nodetool')
    host = __salt__['config.option']('cassandra.host')
    return __salt__['cmd.run_stdout']('{0} -h {1} {2}'.format(nodetool, host, cmd))