map算子

>>> list1 = [1,2,3,4,5,6,7,8,9,10]
>>> print(*list1)
1 2 3 4 5 6 7 8 9 10
>>> list2 = map(lambda x : x**2,list1)
>>> print(*list2)
1 4 9 16 25 36 49 64 81 100