python读写json

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大致是增,删,改,读
操作json本质上是把字符串转成dict, 然后对dict进行增删改,最后再转成字符串,具体看代码

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  1. #!/usr/bin/python3

  2. import sys
  3. import os
  4. import json

  5. # 操作json本质上是把字符串转成dict, 然后对dict进行增删改,最后再转成字符串
  6. def TestJson(resFile):
  7.     try:
  8.         resFp = open(resFile, "r")
  9.         dstJson = json.load(resFp)
  10.         resFp.close()
  11.     except Exception as e:
  12.         dstJson = {}

  13.     if 'hello' not in dstJson.keys():
  14.         dstJson['hello'] = 'hello world!' #不存在则添加否修改
  15.         print(dstJson['hello'])
  16.     else:
  17.         del dstJson['hello'] # 如果存在,则删除

  18.     if 'list' not in dstJson.keys():
  19.         dstJson['list'] = [1, 2] # 不存在则生成[1, 2]
  20.     else:
  21.         dstJson['list'].append(3) # 存在则添加一个3
  22.     print(dstJson['list'])

  23.     if 'dtest' not in dstJson.keys():
  24.         dictAdd = {'dtest':'value'}
  25.         dstJson.update(dictAdd) # dict合并dict

  26.     strJson = json.dumps(dstJson)

  27.     with open(resFile, 'w', encoding='utf-8') as of:
  28.         of.write(strJson)
  29.     of.close()

  30. if __name__ == '__main__':
  31.     TestJson(sys.argv[1])
作者:帅得不敢出门
10-04 18:09
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