从JSON文件中打印元素

时间:2018-06-08 07:56:06

标签: python json

我必须遍历一个json文件。我作为列表导入python并打印所有独特的位置。但是,我编写的代码只打印了前几个地方,并没有遍历列表中的所有538个元素:

import pandas as pd
import json

with open('data.json') as json_file:      
json_file = json_file.readlines()
json_file = dict(map(json.loads, json_file))

for i in range (0, len(json_file)-1):
    unique = json_file[i]['payload']['locality']
    print(unique)

相反它仍然只打印约30个地方,我该如何解决这个问题呢?

下面是我文件的片段:

{ 'payload': {'existence_full': 1,
  'geo_virtual': '["50.794876|-1.090893|20|within_50m|4"]',
  'latitude': '50.794876',
  'locality': 'Portsmouth',
  '_records_touched': '{"crawl":16,"lssi":0,"polygon_centroid":0,"geocoder":0,"user_submission":0,"tdc":0,"gov":0}',
  'email': 'info.centre@port.ac.uk',
  'existence_ml': 0.9794948816203205,
  'address': 'Winston Churchill Av',
  'longitude': '-1.090893',
  'domain_aggregate': '',
  'name': 'University of Portsmouth',
  'search_tags': ['The University of Portsmouth',
   'The University of Portsmouth Students Union',
   'University House'],
  'admin_region': 'England',
  'existence': 1,
  'post_town': 'Portsmouth',
  'category_labels': [['Community and Government',
    'Education',
    'Colleges and Universities']],
  'region': 'Hampshire',
  'review_count': '1',
  'geocode_level': 'within_50m',
  'tel': '023 9284 8484',
  'placerank': 42,
  'placerank_ml': 69.2774043602657,
  'address_extended': 'Unit 4',
  'category_ids_text_search': '',
  'fax': '023 9284 3122',
  'website': 'http://www.port.ac.uk',
  'status': '1',
  'neighborhood': ['The Waterfront'],
  'geocode_confidence': '20',
  'postcode': 'PO1 2UP',
  'category_ids': [29],
  'country': 'gb',
  '_geocode_quality': '4'},
 'uuid': '297fa2bf-7915-4252-9a55-96a0d44e358e'}

2 个答案:

答案 0 :(得分:1)

您尚未将数据导入列表,而是导入字典。如果你想将json导入列表,你可以这样做:

import json

with open('data.json') as json_file:      
    json_array = json.load(json_file)

for item in json_array:
    unique = item['payload']['locality']
    print(unique)

您说您想要打印所有独特的地区,但在您的代码中,您打印所有地区而不检查它们是否是唯一的。

答案 1 :(得分:0)

问题可能是您的文件中有重复记录,并且当您将数据加载到dict时,密钥会发生冲突,导致其中一部分被丢弃。不是将数据存储在dict中,而是将其存储在list中:

import json

with open('data.json') as json_file:      
    lines = json_file.readlines()
    records = list(map(json.loads, lines))

然后,您应该能够遍历records

print('There are %d records' % len(records))
for record in records:
    unique = record['payload']['locality']
    print(unique)