python 列表生成式将两个列表组合

l1=[1,2,3,4,5]
l2=[10,20,30,40,50]
l3=[(x,y) for x in l1 for y in l2 if y/x==10  ]
l4=[{x:y} for x in l1 for y in l2 if y/x==10  ]
print(l3)
print(l4)

[(1, 10), (2, 20), (3, 30), (4, 40), (5, 50)]
[{1: 10}, {2: 20}, {3: 30}, {4: 40}, {5: 50}]