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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 run_nupack(kwargs):
    '''Run picklable Nupack command.

    :param kwargs: keyword arguments to pass to Nupack as well as 'cmd'.
    :returns: Variable - whatever `cmd` returns.

    '''
    run = NUPACK(kwargs['seq'])
    output = getattr(run, kwargs['cmd'])(**kwargs['arguments'])
    return output