p0010 迭代器

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
import itertools
import time
a = itertools.count()


mylist = [1,2,3]
b = itertools.cycle(mylist)


# for var in b:
# time.sleep(1)
# print(var)

a = [1,2,3,4,5]
res = iter(a)
print(next(res))
print(next(res))
print(next(res))
print(next(res))
print(next(res))
# print(next(res))

# print(next(res)
# 可迭代对象和迭代器
# 只要有iter 就可以被iter加工 然后通过next 或for访问现金和