遍历python中的列表列表

Question

I am reading the following nested dictionary in json from an API

{
 "result": [{
               "short_description": "I am getting bluescreen error",
               "sys_id": "39b5f8c2376ede007520021a54990e5c",
               "opened_at": "2016-04-04 05:19:53",
               "number":"INC0258523"
             },
             {
               "short_description": "laptop crashed with a blue screen",
               "sys_id": "da0095380f43d200a4f941fce1050eeb",
               "opened_at":"2016-04-25 06:33:52",
               "number":"INC0259067"
             }, 
             {
               "short_description": "Laptop not booting",
               "sys_id": "ecf9c9b00f43d200a4f941fce1050e17",
               "opened_at": "2016-04-25 06:07:16",
               "number": "INC0259061"
             }]
}

I need to filter the data based on two from and two dates. opened_at is the value containing the date info.

My attempt so far is as follows

    url = "http://ip:port/api"

    response = urllib.urlopen(url)
    data = json.loads(response.read())
    print type(data)
    pattern = 'opened_at'
    element = '2016-04-25 06:33:19'
    with open('D:/Output.csv', 'wb') as f:  
        w = csv.DictWriter(f, data['result'][0].keys()) 
        w.writeheader()
        print type(data['result'])
        for key in data['result']:
            for v, val in data['result'].items():
                if v == pattern and val == element:
                    w.writerow(v)

I get the below error on running the code

AttributeError: 'list' object has no attribute 'items'

I know that the type of data['result'] is a list.Any help will be appreciated. Thanks!

Answer 1

data['result'] is a list of dictionaries, you should iterate on it like follows:

for d in data['result']:
    for k, v in d.items():

Answer 2

you need this

import json
al = """
{
 "result": [{
               "short_description": "I am getting bluescreen error",
               "sys_id": "39b5f8c2376ede007520021a54990e5c",
               "opened_at": "2016-04-04 05:19:53",
               "number":"INC0258523"
             },
             {
               "short_description": "laptop crashed with a blue screen",
               "sys_id": "da0095380f43d200a4f941fce1050eeb",
               "opened_at":"2016-04-25 06:33:52",
               "number":"INC0259067"
             }, 
             {
               "short_description": "Laptop not booting",
               "sys_id": "ecf9c9b00f43d200a4f941fce1050e17",
               "opened_at": "2016-04-25 06:07:16",
               "number": "INC0259061"
             }]
}
"""
myjson = json.loads(al)
for val in myjson['result']:
    print val['opened_at']
    for key, value in val.items():#change it to keys if required

Answer 3

Actually "Result" is a dictionnary. You can recognize a dictionnary in Python by the "{" and "}" it is circled with. So here it is a dictionnary of a list of dictionnaries !