来自json的多列csv在python中

Question

如何在python中将json转换为csv。希望它使用lat和long列在excel中打开。

[
  {
    "Lat": "-122.37391463199998",
    "Long": "47.630880207000075"
  },
  {
    "Lat": "-122.38447021399998",
    "Long": "47.70118823100006"
  },
  {
    "Lat": "-122.34729431799997",
    "Long": "47.64717111900006"
  }
]

Answer 1

您可以使用json模块将字符串转换为字典。然后使用csv模块将它们保存到文件中。

import json, csv
json_string = '[{"Lat": "-122.37391463199998", "Long": "47.630880207000075"}, {"Lat": "-122.38447021399998", "Long": "47.70118823100006"}, {"Lat": "-122.34729431799997", "Long": "47.64717111900006"} ]'
data = json.loads(json_string)

with open('foo.csv', 'wb') as csvfile:
    csv_writer = csv.DictWriter(csvfile, delimiter=',', fieldnames=['Lat', 'Long'])
    csv_writer.writeheader()
    csv_writer.writerows(data)

Answer 2

csv模块在​​writerows()类上有一个方便的DictWriter方法：

import csv
import json

data = json.loads(""" My Json """)

with open('lat_long.csv', 'w') as csvfile:
    fieldnames = ['Lat', 'Long']
    writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
    writer.writeheader()
    writer.writerows(data)