>>> mapper{1: ['a', 'b', 'c'], 2: ['d'], 3: ['e'], 4: ['f', 'g'], 5: ['h'], 6: ['i'], 7: ['a', 'g']}>>> def itertransfer(mapper):... for k, values in mapper.items():... for v in values:... yield (k, v)... >>> for k, v in itertr...
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