python json 数据操作

Posted 2020-10-14 陈富林

• python 有专门针对 json 操作的函数

• python 输出 json 字符串

  #!/usr/bin/python3
  
  import json
  
  mytest_js = {
          "a" : 1,
          "b" : 2
          }
  
  test = json.dumps({'4': 5, '6': 7});     # 合成不换行的字符串 json 数据
  
  test1 = json.dumps({'4': 5, '6': 7}, sort_keys = True, indent = 4, separators = (',', ':'));   # 合成有换行的字符串数据
  
  mytest_jsson = json.dumps(mytest_js);            #  解析出 json 格式的字符串
  
  print(test);
  print("");
  print(test1);
  print("");
  print(mytest_jsson);

  // 输出
  {"4": 5, "6": 7}
  
  {
      "4":5,
      "6":7
  }
  
  {"a": 1, "b": 2}

• json 字符串 转化为 python 对象

  test1 = json.dumps({'4': 5, '6': 7}, sort_keys = True, indent = 4, separators = (',', ':'));   # 先合成为字符串
  text = json.loads(test1);    # 后转化为对象输出
  print(text);
  print(text['4']);
  print(text['6']);

  {'4': 5, '6': 7}
  5
  7

• 参考

  https://docs.python.org/2/library/json.html
  http://www.runoob.com/python/python-json.html
  http://www.runoob.com/python3/python3-json.html