繁体   English   中英

如何用python3迭代字典列表

[英]How to iterate a list of dictionary with python3

遍历字典结果列表错误:

AttributeError: 'list' object 没有属性 'items'

改变:

for the_key, the_value in bucket.items():

至:

for the_key, the_value in bucket[0].items():

结果是第一个元素。 我想捕捉所有元素

bucket = [{'Name:': 'Share-1', 'Region': 'ap-south-1'}, {'Name:': 'Share-2', 'Region': 'us-west-1'}]


for the_key, the_value in bucket.items():
    print(the_key, 'corresponds to', the_value)

实际结果:

AttributeError: 'list' object 没有属性 'items'

Output 想要:

Name: Share-1
Region: ap-south-1

Name: Share-2
Region: us-west-1

因为bucket是一个列表,而不是一个dict ,所以你应该首先迭代它,并且对于每个d ,迭代它的items

bucket = [{'Name:': 'Share-1', 'Region': 'ap-south-1'}, {'Name:': 'Share-2', 'Region': 'us-west-1'}]

for d in bucket:
    for the_key, the_value in d.items():
        print(the_key, 'corresponds to', the_value)

Output:

Name: corresponds to Share-1
Region corresponds to ap-south-1
Name: corresponds to Share-2
Region corresponds to us-west-1

你可以试试这个:

for dictionary in bucket:
    for key, val in dictionary.items():
        print(the_key, 'corresponds to', the_value) 

您的数据有两层,因此您需要两个循环:

for dct in lst:
    for key, value in dct.items():
        print(f"{key}: {value}")
    print() # empty line between dicts

可以以更functional的方式做到这一点,我更喜欢它:

map(lambda x: print("name: {x}".format(x=x['Name:'])), bucket)

它很懒,没有for循环,而且可读性更强

运行:

bucket = [{'Name:': 'Share-1', 'Region': 'ap-south-1'}, 
          {'Name:': 'Share-2', 'Region': 'us-west-1'}]

你会得到(当然你需要使用map ):

name: Share-1
name: Share-2

暂无
暂无

声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.

 
粤ICP备18138465号  © 2020-2024 STACKOOM.COM