[Python-ideas] Multiple items for each loop in comprehension

How about allowing to create multiple items for each loop in comprehension? I'm not sure this grammar is available, though. for example: [loop for set] s = set() for i in range(10): s.add(i) s.add(i * 10) [current comprehension] s = { x for i in range(10) for x in (i, i * 10) } [suggested comprehension] s = { i, i * 10 for i in range(10) } [loop for dict] dic = {} for i in range(10): dic[i] = i * 10 dic[i * 10] = i [current comprehension] dic = { k: v for i in range(10) for k, v in ((i, i * 10), (i * 10, i)) } [suggested comprehension] dic = { i: i * 10, i * 10: i for i in range(10) }