penguins-python

from itertools import chain,imap

manufacturing_groups = { 'multiglobal manufacturing group',
                         'intergalactic joint ventures',
                         'transdimensional megacorp', }
manufacturers = { 'multiglobal manufacturing group': { 'red heron manufacturers',
                                                       'blue bass super-corp',
                                                       'yellow dog llc',
                                                       'orange penguin family manufacturers',
                                                       'green hornet industries', },
                 'intergalactic joint ventures': { 'yellow dog llc',
                                                   'purple butterfly inc', },
                 'transdimensional megacorp': { 'maroon baboon manufacturer',
                                                'orange penguin family manufacturers',
                                                'green hornet industries', }, }
warehouses = { 'red heron manufacturers': {'neptune building'},
               'blue bass super-corp': {'saturn warehouse'}, 
               'yellow dog llc': {'mars storage'}, 
               'orange penguin family manufacturers': {'venus building'}, 
               'green hornet industries': {'jupiter building'}, 
               'purple butterfly inc': {'pluto ministorage'}, 
               'maroon baboon manufacturer': {'mercury warehouse'}, }
inventories = { 'neptune building': {'rose widgets', 'petunia widgets'},
                'saturn warehouse': {'rose widgets', 'daffodil widgets'},
                'mars storage': {'poppy widgets', 'forget-me-not widgets'},
                'venus building': {'goldenrod widgets'},
                'jupiter building': {'magnolia widgets'},
                'pluto ministorage': {'indian paintbrush widgets', 'daffodil widgets'},
                'mercury warehouse': {'carnation widgets'}, }

def flatmap(items, f):
    return chain.from_iterable(imap(f, items))

def getl(d):
    return lambda k : d[k]

print set(flatmap(manufacturing_groups, getl(manufacturers)))

print set(flatmap(flatmap(manufacturing_groups,getl(manufacturers)),getl(warehouses)))
print set(reduce(flatmap, [manufacturing_groups, getl(manufacturers), getl(warehouses), getl(inventories)]))

def nest(l):
    return map(lambda x : [x], l)

def getll(d):
    def getlld(ks):
        res = d[ks[0]]
        return map(lambda x : [x] + ks, res)
    return getlld

print list(reduce(flatmap, [nest(manufacturing_groups), getll(manufacturers), getll(warehouses), getll(inventories)]))