Question

我有一个纬度/经度的JSON文件，我想要转换为CSV文件。我想用Python做到这一点。我已阅读/尝试了所有其他stackoverflow和谷歌搜索结果的建议。我已经设法创建了CSV并包含标题，但除此之外，愚蠢的东西开始发生。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"])

这就是它崩溃的地方（“？”意味着我不知道该放什么。我已经尝试了各种各样的组合，我在寻找答案时发现了这些组合）：

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

我通过this question获得了little_fish的答案。我可以看到我们的JSON示例略有不同，我假设这与我无法使其工作有关...

非常感谢任何帮助，如果需要，我很乐意提供澄清。仅供参考，我是Python的新手，所以如果您要使用行话，请尽可能清楚地解释。谢谢！（P.S.不确定它是否重要，但我使用的是IDLE）。

Answer 1

我会使用csv.DictWriter，因为你正在处理dicts，这正是DictWriter所针对的情况。

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)

修改
由于.writeheader()方法仅在2.7中添加，因此您可以在旧版本中使用类似的内容：

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

逐个循环遍历列表，并明确写出字段名称对于这种情况可能是最简单的。

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

基于一些答案回答，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']] )

使用Python（空闲）将JSON转换为CSV

4 个答案: