python - 在 python 中将多个列表写入 JSON 文件

Question

假设我有以下列表

list1 = [{"created_at": "2012-01-31T10:00:04Z"},{"created_at": "2013-01-31T10:00:04Z"}] 
list2 = [{"created_at": "2014-01-31T10:00:04Z"}] 

我可以使用 json.dump(list1,file,indent=2) 将第一个列表写入 JSON 文件，结果为

[
  {
    "created_at": "2012-01-31T10:00:04Z"
  },
  {
    "created_at": "2013-01-31T10:00:04Z"
  }
]

我的问题是，如何附加第二个列表的内容？如果我简单地执行 json.dump(list2,file,indent=2) ，则会产生如下无效的 JSON 文件。

[
  {
    "created_at": "2012-01-31T10:00:04Z"
  },
  {
    "created_at": "2013-01-31T10:00:04Z"
  }
][
  {
    "created_at": "2014-01-31T10:00:04Z"
  }
]

编辑:列表是通过解析大约 8000 个文件动态创建的。上面的列表只是示例。我可能会将 8000 个列表写入 JSON 文件，因此简单的附加将不起作用。

Answer 1

In [1]: import json

In [2]: list1 = [{"created_at": "2012-01-31T10:00:04Z"},{"created_at": "2013-01-31T10:00:04Z"}] 

In [3]: list2 = [{"created_at": "2014-01-31T10:00:04Z"}] 

In [4]: list1.extend(list2)

In [5]: json.dumps(list1)
Out[5]: '[{"created_at": "2012-01-31T10:00:04Z"}, {"created_at": "2013-01-31T10:00:04Z"}, {"created_at": "2014-01-31T10:00:04Z"}]'

或

In [8]: json.dumps(list1 + list2)
Out[8]: '[{"created_at": "2012-01-31T10:00:04Z"}, {"created_at": "2013-01-31T10:00:04Z"}, {"created_at": "2014-01-31T10:00:04Z"}]'