Question

我有2500行JSON代码，我需要在其中用新值替换几个值（20位ID）。这是一个快速查找和替换的功能，而且由于有了这个论坛，我昨天才开始工作。现在，我注意到在python控制台中打印出的代码不是正确的JSON，因此当我复制并粘贴它时，会引发很多错误。我试图找到一种加载JSON文件，运行查找并替换并将结果导出到新JSON文件的方法。

我首先尝试用open加载JSON文件并将其分配给变量，但是当我这样做时，find and replace函数不起作用。因此，我只是将原始代码分配给了一个变量。但是，当我尝试编写/导出JSON文件时，它根本无法工作。我尝试了很多在网上找到的解决方案，但是所有的抛出错误都没有找到'str'或'write'对象，或者只是创建了空文件。

下面的代码是我需要做的一个例子。我不允许发布实际的代码。

import string
import csv
import json
from pprint import pprint

# These values need to be replaced in the code
# 1) Original View
# 2) View Source

valuesToReplace = ["Original View",
                   "View Source"
                   ]

# Replace/change these values
newValues = ["New Original View",
             "New View Source"
             ]

data = """{"menu": {
    "header": "SVG Viewer",
    "items": [
        {"id": "Open"},
        {"id": "OpenNew", "label": "Open New"},
        null,
        {"id": "ZoomIn", "label": "Zoom In"},
        {"id": "ZoomOut", "label": "Zoom Out"},
        {"id": "OriginalView", "label": "Original View"},
        null,
        {"id": "Quality"},
        {"id": "Pause"},
        {"id": "Mute"},
        null,
        {"id": "Find", "label": "Find..."},
        {"id": "FindAgain", "label": "Find Again"},
        {"id": "Copy"},
        {"id": "CopyAgain", "label": "Copy Again"},
        {"id": "CopySVG", "label": "Copy SVG"},
        {"id": "ViewSVG", "label": "View SVG"},
        {"id": "ViewSource", "label": "View Source"},
        {"id": "SaveAs", "label": "Save As"},
        null,
        {"id": "Help"},
        {"id": "About", "label": "About Adobe CVG Viewer..."}
    ]
}}
"""

# If, instead, JSON file is loaded and assigned to variable, ReplaceValues throws an error
# with open(r"C:\jsonexample\codeExample.json") as dataFile:
#     data = json.load(dataFile)

def ReplaceValues(valuesToReplace, newValues, data):
    for i in range(len(newValues)):
        data = data.replace(valuesToReplace[i], newValues[i])
    return data

data = ReplaceValues(valuesToReplace, newValues, data)

pprint(data)

json.dump(data, r"C:\\jsonexample\\template\\newCode.json")

Answer 1

您似乎缺少以r和w模式打开文件的信息（更多信息here）。甚至json.dump()都需要保存文件内容。

示例：

with open('out.json', 'w') as file:
    file.write(json.dumps(json_data))

但是对于您而言，您可能根本不需要将其读取为JSON，因为它是通用查找，并且全部替换了所有实例。

假设您的输入文件就像您问题中的data字符串。

尝试一下：

#replacements as key-value pairs
replacements = {
  'Original View':'New Original View', 
  'View Source':'New View Source'
  }

#Open the input file in read mode and get data as string
with open('your_file.json', 'r') as file:
  data = file.read()

#Replace all old value with new values
for old, new in replacements.items():
  data = data.replace(old, new)

#Open the output file in write mode and save
with open('output_file.json', 'w') as file:
  file.write(data)

输出：

{"menu": {
  "header": "SVG Viewer",
  "items": [
      {"id": "Open"},
      {"id": "OpenNew", "label": "Open New"},
      null,
      {"id": "ZoomIn", "label": "Zoom In"},
      {"id": "ZoomOut", "label": "Zoom Out"},
      {"id": "OriginalView", "label": "New Original View"},
      null,
      {"id": "Quality"},
      {"id": "Pause"},
      {"id": "Mute"},
      null,
      {"id": "Find", "label": "Find..."},
      {"id": "FindAgain", "label": "Find Again"},
      {"id": "Copy"},
      {"id": "CopyAgain", "label": "Copy Again"},
      {"id": "CopySVG", "label": "Copy SVG"},
      {"id": "ViewSVG", "label": "View SVG"},
      {"id": "ViewSource", "label": "New View Source"},
      {"id": "SaveAs", "label": "Save As"},
      null,
      {"id": "Help"},
      {"id": "About", "label": "About Adobe CVG Viewer..."}
  ]
}}

如何在JSON文件中查找和替换所有出现的单词，并使用python保存生成的JSON？

1 个答案: