在Python中将JSON对象转换为表结构

Question

我有一些带有“项目列表”的 JSON。我想将其转换为带标题的分号分隔文件

我想以这种格式生成线条：

id, date, order[x][0], order[x][1], ...

我的问题是我需要包含标题、字段名称，并且一些

order

项目没有所有可能的元素，因此我不能只是将这些值连接在一起。

对于下面的 JSON，我期望以下输出：

id;date;prefix;number;quantity;code;index
06107;2023-09-25T01:51:04Z;VO;32233809;1;;4
06107;2023-09-25T01:51:04Z;VO;31438125;1;;4
06107;2023-09-25T10:00:51Z;VO;31407983;1;14;4
06107;2023-09-25T10:00:51Z;VO;986116;6;12;4

我猜也许某种熊猫用法是解决方案，但我不确定如何进行映射和导出。

        "items": [
            {
                "id": "06107",
                "date": "2023-09-25T01:51:04Z",
                "order": [
                    {
                        "prefix": "VO",
                        "number": "32233809",
                        "quantity": 1,
                        "index": 4
                    },
                    {
                        "prefix": "VO",
                        "number": "31438125",
                        "quantity": 1,
                        "index": 4
                    }
                ]
            },
            {
                "id": "06107",
                "date": "2023-09-25T10:00:51Z",
                "order": [
                    {
                        "prefix": "VO",
                        "number": "31407983",
                        "quantity": 1,
                        "code": 14,
                        "index": 4
                    },
                    {
                        "prefix": "VO",
                        "number": "986116",
                        "quantity": 6,
                        "code": 12,
                        "index": 4
                    }
                ]
            }
        ]

Answer 1

我认为最简单的方法是通过

csv.DictWriter()

extrasaction="ignore"

。

import csv

data = [
    {
        "id": "06107",
        "date": "2023-09-25T01:51:04Z",
        "order": [
            {"prefix": "VO", "number": "32233809", "quantity": 1, "index": 4},
            {"prefix": "VO", "number": "31438125", "quantity": 1, "index": 4}
        ]
    },
    {
        "id": "06107",
        "date": "2023-09-25T10:00:51Z",
        "order": [
            {"prefix": "VO", "number": "31407983", "quantity": 1, "code": 14, "index": 4},
            {"prefix": "VO", "number": "986116", "quantity": 6, "code": 12, "index": 4}
        ]
    }
]

all_items = list()
for item in data:
    for detail in item["order"]:
        all_items.append({
            **{"id": item["id"], "date": item["date"]},
            **detail
        })

headers = ["id", "date", "prefix", "number", "quantity", "code", "index"]
with open("foo.csv", "w", newline="") as file_out:
    writer = csv.DictWriter(file_out, delimiter=";", fieldnames=headers, extrasaction="ignore")
    writer.writeheader()
    writer.writerows(all_items)

这会给你一个文件：

id;date;prefix;number;quantity;code;index
06107;2023-09-25T01:51:04Z;VO;32233809;1;;4
06107;2023-09-25T01:51:04Z;VO;31438125;1;;4
06107;2023-09-25T10:00:51Z;VO;31407983;1;14;4
06107;2023-09-25T10:00:51Z;VO;986116;6;12;4