如何在python中多次使用迭代器

my_iter = iter([1, 2, 3, 4, 5])
my_list = list(my_iter)
print(my_list)  # 输出 [1, 2, 3, 4, 5]

import itertools

my_iter = iter([1, 2, 3, 4, 5])
my_iter1, my_iter2 = itertools.tee(my_iter, 2)

# 第一个迭代器
for item in my_iter1:
    print(item)  # 输出 1, 2, 3, 4, 5

# 第二个迭代器
for item in my_iter2:
    print(item)  # 输出 1, 2, 3, 4, 5

class MyIterator:
    def __init__(self, data):
        self.data = data
        self.index = 0

    def __iter__(self):
        return self

    def __next__(self):
        if self.index >= len(self.data):
            raise StopIteration
        item = self.data[self.index]
        self.index += 1
        return item

my_iter = MyIterator([1, 2, 3, 4, 5])

# 第一次迭代
for item in my_iter:
    print(item)  # 输出 1, 2, 3, 4, 5

# 第二次迭代
for item in my_iter:
    print(item)  # 输出 1, 2, 3, 4, 5