Question

我想在json文件中读取source的所有id，如下所示。一个id可以有两个来源，有时是零来源。

[ 
    {
        "trailers": {
            "quicktime": [], 
            "youtube": [
                {
                    "source": "source1", 
                    "type": "Trailer", 
                    "name": "Vf", 
                    "size": "HD"
                },
        {
                    "source": "source2", 
                    "type": "Trailer", 
                    "name": "Vf", 
                    "size": "HD"
                }
            ], 
            "id": 57417
        }, 

    {
        "trailers": {
            "quicktime": [], 
            "youtube": [], 
            "id": 57418
        }
]

我尝试了很多解决方案而且我停在了这个解决方案中，它也不起作用：

from itertools import chain
trailers = {}
for item in j:        
    if item['trailers']:
        e = item['trailers']
        for k,value in e.iteritems():
            if k == "youtube":
                for each_dict in value:
                    for innerk, innerv in each_dict.iteritems():
                        if innerk == "source" :
                            trailers = dict(trailers.items() , {'trailer' : 'None'}.iteritems())                                                                
                        else:
                            trailers = {'trailer' : 'None'}

修改： 我想看到这个结果：

57417, source1, source2
57418, None

你有什么建议吗？

Answer 1

在YouTube上查找所有预告片：

trailers = {film['trailers']['id']: [source['source'] for source in film['trailers'].get('youtube', [])] 
            for film in j}

这会产生：

>>> {film['trailers']['id']: [source['source'] for source in film['trailers'].get('youtube', [])] 
...             for film in j}
{57417: ['source1', 'source2'], 57418: []}

阅读列表中的dicts字典

1 个答案: