python中可迭代对象有哪些

判断一个对象是不是可迭代对象:

from collections import Iterable

isinstance(list(range(100)), Iterable)
isinstance('Say YOLO Again.')

列表:

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L = list(range(100))for i in L:
    print(i)

元组:

T = tuple(range(100))for i in T:
    print(i)

字典:

dic = {'name': 'chen', 'age': 25, 'loc': 'Tianjin'}
# 以列表的形式返回
keylist(dic.keys())
# 以列表的形式返回
valuelist(dic.values())
# 循环key
for key in dic:
    print(key)    
# 循环value
for value in dic.values():
    print(value)    
# 循环key, value
for key, value in dic.items():
    print(key, value)

字符串:

S = 'Say YOLO Again!'for s in S:    
print(s)
返回'索引-元素'对:
for i, value in enumerate('Say YOLO Again.'):    
print(i, value)

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