JSON 返回错误请求 - postcodes.io答案

【问题标题】：JSON returning Bad request - postcodes.ioJSON 返回错误请求 - postcodes.io
【发布时间】：2018-11-26 14:28:36
【问题描述】：

我有这个方法：

import requests
import json

data = {  
    "postcodes" : ["AL1 2RJ", "AL9 5JP", "BN14 9GB", "BN16 3RT", "BN23 6QD", "BN3 7PN", "BN9 0AG", "BR5 3RP", "CM2 6XE","CM20 2SX","CR0 4NX","CT1 1DX",
    "CT1 3TQ", "CT10 2RQ", "CT16 3PS", "CT19 5SY", "DA1 4LD", "DA11 0DQ", "E4 8JA", "E6 6LG", "EN1 1TH", "EN9 1BY", "GU14 7QL", "GU19 5DG", "GU22 8BD",
    "GU34 2QS","GU7 1DR", "GU9 9QJ", "HA4 0LN", "HP11 1FY", "HP20 1DH", "HP3 9AA", "IG2 6BE", "KT12 2SS", "KT14 7NP", "LU1 3JH", "LU5 4XZ",
    "ME10 2XD", "ME20 7TP", "ME5 9SQ", "ME8 0PU", "MK1 1BN", "MK18 1TB", "N11 3PW", "NW1 9EX", "NW9 7TH", "PO19 7YH", "PO22 9NF", "PO3 5LZ",
    "PO9 1ND", "RG12 1EN", "RG2 0HB", "RG22 4TT", "RG30 1PR", "RG40 2NU", "RG41 5HH", "RH1 6QL", "RH11 7ST", "RH12 1HR", "RH15 9QT", "RH19 1QL",
    "RM20 3LP", "RM7 0AN", "RM9 6SJ", "SE1 5BA", "SE10 8DA", "SE26 4PU", "SE28 8RD", "SE7 7TZ", "SE9 5LT", "SG13 7RQ", "SL1 4XB", "SL6 1AY",
    "SS1 1PA", "SS13 3BY", "SS14 3AF", "SS2 6FW", "SS67UP", "SW11 3RX", "SW17 0BW", "SW20 0JQ", "TN14 5EW", "TN2 3FB", "TN23 7DH", "TN37 7PB",
    "TN40 2JS", "TW13 4EX", "TW8 8JW", "TW9 1YB", "UB4 0TU", "UB6 0UW", "UB8 2TE", "WD17 2SF", "WD6 4PR"]
    }

headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
resp = requests.post('https://api.postcodes.io/postcodes/', data=data, headers=headers)
print(resp.json())

我运行这个python myscript.py < myfile.json

{'status': 400, 'error': 'Invalid JSON submitted. You need to submit a JSON object with an array of postcodes or geolocation objects. Also ensure that Content-Type is set to application/json'}

但请求似乎没问题，postcodes.io 文档是这样说的：

Bulk Postcode Lookup

Accepts a JSON object containing an array of postcodes. Returns a list of matching postcodes and respective available data.

Be sure to submit JSON requests setting Content-Type to application/json

Accepts up to 100 postcodes.

POST
https://api.postcodes.io/postcodes

Post Data

This method requires a JSON object containing an array of postcodes to be posted, e.g.

{  
  "postcodes" : ["PR3 0SG", "M45 6GN", "EX165BL"]
}

This is the doc page

查询似乎没问题，有什么想法吗？

【问题讨论】：

您是否尝试过使用json=data 而不是data=data 以设置正确的内容类型？
哈哈，就是这样，谢谢，如果你愿意，你可以把这个作为答案:)
我认为它可能是重复的...我当然见过它出现过几次...不过我能找到一个吗（sigh）...相当当然，我已经看到了一个关于何时使用数据与 json 以及它们为什么不同的不错的文章......
嗯，好的，没关系，非常感谢:)
只是没有旁注...来自 postcodes.io 的数据合理吗？我知道我玩过它，而且我确定它错过了一些我确定在 PAF 上存在的地址...

标签： python json python-requests

【解决方案1】：

您只需将data=data 替换为json=data。这样就可以针对content-type=application/json进行验证。

resp = requests.post('https://api.postcodes.io/postcodes/', json=data, headers=headers)

它会起作用的。

【讨论】：

【解决方案2】：

所以我遇到了非常相似的问题，我正在努力将数据框列转换为列表，然后转换为 json 对象。解决方案可能很明显，但我迷失在 json.dumps() 中，这不是解决方案。以下工作：

import json
import requests
import pandas as pd

#imagine you have a csv, excel where you have the postcodes
create_sample={'Postcode': ['OL67UB', 'AB101QS']} 
df_postcodes=pd.DataFrame(create_sample)

list_postcodes=list(df_postcodes['Postcode'])

data = {  
        "postcodes" : list_postcodes
      }

headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
resp = requests.post('https://api.postcodes.io/postcodes/', json=data, headers=headers)
print(resp.json())

【讨论】：

请记住，批量表单只能处理 100 个邮政编码，因此如果您有数千个邮政编码，则逐个迭代更有意义。