使用 Python 将 JSON 转换为 CSV（空闲）

Question

我有一个纬度/经度的 JSON 文件，我想将其转换为 CSV 文件。我想用 Python 做到这一点。我已经阅读/尝试了所有其他 stackoverflow 和谷歌搜索结果建议。我已经设法创建 CSV 并包含标题，但除此之外，愚蠢的事情开始发生。到目前为止，这是我的代码的工作部分：

import json, csv

x="""[
    {"longitude":"-73.689070","latitude":"40.718000"},
    {"longitude":"-73.688400","latitude":"40.715990"},
    {"longitude":"-73.688340","latitude":"40.715790"},
    {"longitude":"-73.688370","latitude":"40.715500"},
    {"longitude":"-73.688490","latitude":"40.715030"},
    {"longitude":"-73.688810","latitude":"40.714370"},
    {"longitude":"-73.688980","latitude":"40.714080"},
    {"longitude":"-73.689350","latitude":"40.713390"},
    {"longitude":"-73.689530","latitude":"40.712800"},
    {"longitude":"-73.689740","latitude":"40.712050"},
    {"longitude":"-73.689820","latitude":"40.711810"},
    {"longitude":"-73.689930","latitude":"40.711380"},
    {"longitude":"-73.690110","latitude":"40.710710"}
]"""

x = json.loads(x)

f = csv.writer(open("test.csv", "wb+"))

f.writerow(["longitude", "latitude"])

这就是它分崩离析的地方（“？”的意思是我不知道该放什么。我尝试了各种我在寻找答案时找到的东西的组合）：

for ? in ?:
    f.writerow([?[?],?[?]])

我从little_fish 对this question 的回答中得到了以上信息。我可以看到我们的 JSON 示例略有不同，我假设这与我无法让它工作的原因有关......

任何帮助都将不胜感激，如果需要，我很乐意提供澄清。仅供参考，我是 Python 新手，所以如果您要使用行话，请尽可能清楚地解释它。谢谢！ （P.S. 不确定这是否重要，但我正在使用 IDLE）。

Answer 1

我会使用csv.DictWriter，因为您正在处理字典，而DictWriter 正是这种情况。

rows = json.loads(x)
with open('test.csv', 'wb+') as f:
    dict_writer = csv.DictWriter(f, fieldnames=['longitude', 'latitude'])
    dict_writer.writeheader()
    dict_writer.writerows(rows)

编辑：
由于 .writeheader() 方法仅在 2.7 中添加，因此您可以在旧版本上使用类似这样的方法：

rows = json.loads(x)
fieldnames = ['longitude', 'latitude']
with open('test.csv', 'wb+') as f:
    dict_writer = csv.DictWriter(f, fieldnames=fieldnames)
    dict_writer.writerow(dict(zip(fieldnames, fieldnames)))
    dict_writer.writerows(rows)

Answer 2

逐一遍历列表，明确地写出字段名称可能是这种情况下最简单的方法。

for row in x:
    f.writerow( [row['longitude'], row['latitude']] )

Answer 3

这将帮助您迭代每个项目并将其写入您的 csv 文件：

import json, csv

x = """[
    {"longitude":"-73.689070","latitide":"40.718000"},
    {"longitude":"-73.688400","latitide":"40.715990"},
    {"longitude":"-73.688340","latitide":"40.715790"},
    {"longitude":"-73.688370","latitide":"40.715500"},
    {"longitude":"-73.688490","latitide":"40.715030"},
    {"longitude":"-73.688810","latitide":"40.714370"},
    {"longitude":"-73.688980","latitide":"40.714080"},
    {"longitude":"-73.689350","latitide":"40.713390"},
    {"longitude":"-73.689530","latitide":"40.712800"},
    {"longitude":"-73.689740","latitide":"40.712050"},
    {"longitude":"-73.689820","latitide":"40.711810"},
    {"longitude":"-73.689930","latitide":"40.711380"},
    {"longitude":"-73.690110","latitide":"40.710710"}
]"""

jsoned = json.loads(x)

with open("test.csv", "wb+") as csv_file:
    csv_writer = csv.writer(csv_file)
    for i in jsoned:
        csv_writer.writerow([i[u'longitude'],
                             i[u'latitide']])

请注意，您在原始帖子中拼错了纬度 (latitide)。

Answer 4

根据一些回答，这就像一个魅力！：

import json, csv

    x="""[
        {"longitude":"-73.689070","latitude":"40.718000"},
        {"longitude":"-73.688400","latitude":"40.715990"},
        {"longitude":"-73.688340","latitude":"40.715790"},
        {"longitude":"-73.688370","latitude":"40.715500"},
        {"longitude":"-73.688490","latitude":"40.715030"},
        {"longitude":"-73.688810","latitude":"40.714370"},
        {"longitude":"-73.688980","latitude":"40.714080"},
        {"longitude":"-73.689350","latitude":"40.713390"},
        {"longitude":"-73.689530","latitude":"40.712800"},
        {"longitude":"-73.689740","latitude":"40.712050"},
        {"longitude":"-73.689820","latitude":"40.711810"},
        {"longitude":"-73.689930","latitude":"40.711380"},
        {"longitude":"-73.690110","latitude":"40.710710"}
    ]"""

    x = json.loads(x)

    f = csv.writer(open("test.csv", "wb+"))

    f.writerow(["longitude", "latitude"])

    for row in x:
        f.writerow( [row['longitude'], row['latitude']] )