Question

我的JSON文件如下：

{"A":[
{"Timestamp": "2017-11-14 14:39:54", "File": "E.kmp", "C":{....},
{"Timestamp": "2017-11-14 14:40:32", "File": "E.kmp", "L":{....},
{"Timestamp": "2017-11-14 14:41:32", "File": "E.kmp", "L":{....},
................................................................,
{"Timestamp": "2017-11-14 14:42:32", "File": "D.kmp", "L":{....},
{"Timestamp": "2017-11-14 14:43:32", "File": "D.kmp", "L":{....}
]

我想将所有“文件”名称更改为“E.kmp”。这就是为什么我需要用“E.kmp”替换“D.kmp”。如果有可能用python或R，请帮助我。 Python是首选。

Answer 1

以下是public function search_professional() { if($this->input->is_ajax_request()) { $professional = $this->UserModel->search_professional($this->input->post('location_id',true),$this->input->post('category_id',true)); foreach ($professional as $row) { echo ' <li> <a class="s_pro" href="'.site_url('Professional/show_professional_detail/'.$row->pro_id).'">'.$row->firstname.' '.$row->lastname.'<br /><span>Description...</span></a></i>'; } } else { show_404(); } }

中的一种方式

数据

library(jsonlite)
library(tidyverse)
res <- fromJSON(json_val) %>%
             map(mutate, File = 'E.kmp') %>%
             toJSON

prettify(res, indent=1)
# {
# "A": [
#  {
#   "Timestamp": "2017-11-14 14:39:54",
#   "File": "E.kmp"
#  },
#  {
#   "Timestamp": "2017-11-14 14:49:54",
#   "File": "E.kmp"
#  },
#  {
#   "Timestamp": "2017-11-14 14:59:54",
#   "File": "E.kmp"
#  }
# ]
#}

Answer 2

只需将D.kmp替换为E.kmp

即可

import json    
text = '''
{"A":[
{"Timestamp": "2017-11-14 14:39:54", "File": "E.kmp", "C":{....},
{"Timestamp": "2017-11-14 14:40:32", "File": "E.kmp", "L":{....},
{"Timestamp": "2017-11-14 14:41:32", "File": "E.kmp", "L":{....},
................................................................,
{"Timestamp": "2017-11-14 14:42:32", "File": "D.kmp", "L":{....},
{"Timestamp": "2017-11-14 14:43:32", "File": "D.kmp", "L":{....}
]
'''

json_data = json.loads(text)
for element in json_data["A"]:
      if element["File"] == "D.kmp":
          element["File"] = "E.kmp"

Answer 3

由于我无法看到您的整个JSON结构，以下是使用replace（）

的方法。

with open('file.json', 'r') as file :
    data = file.read()

data = data.replace('"File": "D.kmp"', '"File": "E.kmp"')

with open('file.json', 'w') as file:
    file.write(data)

Answer 4

我想有简单的方法：

your_json['A'] =[i for i in your_json['A'] if not i.update({"File":"D.kmp"})]

Answer 5

一个简单的解决方案是使用for循环迭代字典并替换值。

json_val = {"A":[{"Timestamp": "2017-11-14 14:39:54", "File": "E.kmp"},
                 {"Timestamp": "2017-11-14 14:49:54", "File": "D.kmp"},
                 {"Timestamp": "2017-11-14 14:59:54", "File": "D.kmp"}
                ]}
for dic in json_val['A']:
    if dic['File'] != 'E.kmp':
        dic['File'] = 'E.kmp'
print json_val

如果值不是File，则上面的代码段会替换列表中所有词典中的键E.kmp的值。

你不需要json.loads(json_val)，因为python可以处理json。

输出将为：

{'A': [{'Timestamp': '2017-11-14 14:39:54', 'File': 'E.kmp'}, 
       {'Timestamp': '2017-11-14 14:49:54', 'File': 'E.kmp'}, 
       {'Timestamp': '2017-11-14 14:49:54', 'File': 'E.kmp'}
      ]}

替换JSON模式

5 个答案:

数据