forked from yidao620c/python3-cookbook
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathiffor.py
More file actions
40 lines (34 loc) · 1.03 KB
/
iffor.py
File metadata and controls
40 lines (34 loc) · 1.03 KB
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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
# encoding: utf-8
"""
Description:
iterable:
它必须提供方法obj.__iter__()，该方法返回一个迭代器对象iter
或者一个定义了__getitem__(index)的对象，当index不合法时引发IndexError。
iterator:
iter必须实现一个方法iter.__next__()
该方法返回下一个对象或者在迭代结束后引发StopIteration异常
"""
__author__ = 'Xiong Neng'
def fibonacci(n):
"""
产生斐波那契数列的函数
通过传递参数n，生产一个长度为n的fibonacci数列并返回
"""
pass
def for_demo():
"""
for循环的的演示
"""
words = ["aa", "bb", "cc"]
# 如果在迭代中想修改集合，请使用集合的备份或者word[:]
for w in words[:]:
if w == 'aa':
words.insert(0, "dd")
print(len(words))
print(words)
# 迭代同时生产index：
for i, v in enumerate(words):
print(i, v)
print("ddd", "dafdf", "ccc")
if __name__ == '__main__':
print(fibonacci.__doc__)