python - 保存数据时保留新行

Question

当我尝试将此 json 数据 [1] 保存到文件中时，python 不会保留 json 数据的新行。我想保存它。我该怎么做？

[1] 保存数据的代码

data = {
  "queuecapacity": "0.0",
  "maps": "9",
  "byteswritten": "44089526",
  "time": "52.5484039783",
  "mem": 49222464,
  "bytesread": "1102253727",
  "cpu": 32000
}

 with open(path, 'w') as out_file:
    out_file.write(json.dumps(data))

Answer 1

将缩进选项传递给 json.dumps()

out_file.write(json.dumps(data, indent=4))

来自 https://docs.python.org/2/library/json.html#json.dump ,

If indent is a non-negative integer, then JSON array elements and object members will be pretty-printed with that indent level. An indent level of 0, or negative, will only insert newlines. None (the default) selects the most compact representation.

另外，如果您已经有了文件对象，您可以使用 json.dump() 重写您的调用，

json.dump(data, out_file, indent=4)