关于下面代码,描述错误的是: from collections import Iterator ages = [17,20,21,23] m = map(str, ages) print(isinstance(m, Iterator)) l = list(m) print(l) t = tuple(m) print(t)
B.
列表l为['17', '20', '21', '23']
C.
t为('17', '20', '21', '23')
D.
t为() 因为迭代器m在list(m)经执行到末尾,不能回退