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SpaceX designs, manufactures and launches advanced rockets and spacecraft The company was founded in 02 to revolutionize space technology, with the ultimate goal of enabling people to live on other planetsFor problem 19, I think in the following way (I must admit that your solution is better) For F=C, then by 527, there is a basis of V to which T has an upper triangular matrixBasically, it boils down to this, def f (_) # I'm the lambda _ t return 'o' def thegenerator () # I'm (f ( (yield x)) for x in l) for x in kvs yield f ( (yield x)) So when iterated over, thegenerator yields x (a member of kvs) and then the return value of f, which is always o, all in one iteration over kvs Lambda Definition T=lambda x/l