Combining dicts, unpacking tuples etc.

lists_tuples.py

# produce the cartesian product of input dicts
# cartesian product is non-commutative, so order matters
import itertools

output = list(itertools.product(dict_one, dict_two, dict_three)
# now you have a list containing nested tuples of all the input dict combinations:
# [(('text_1', value_1), ('text_2', value_2), ('text_3', value_3)), … ]

# output list of concatenated text and summed values for each top-level tuple
flattened = [[' '.join(text), sum(numbers)] for text, numbers in [zip(*item) for item in output]]

# or using a generator expression
def gen_list(items)
    for tuples in items:
        text, numbers = zip(*tuples)
        yield ' '.join(text), sum(numbers)

print list(gen_list(output))

# you can be even more concise if the same operation is required for keys and values:
print map(lambda v: map(' '.join, zip(*v)), output)