无法从 api 中提取简单信息

Question

我正在尝试从 api 中获取信息。如果我理解正确的话，一旦我使用 json 模块我应该得到一本字典，我应该可以从中提取信息。

但是无论我使用什么键都会出现错误

import requests


r = requests.get('https://api.mercadolibre.com/sites/MLA/search?q=gt%20710%20%20usado%20&sort=price_asc')
a  = r.json()

print(a['title'])

无论我使用什么关键字都出现以下错误

Traceback (most recent call last):
  File "C:\Users\asdf\Desktop\la\some.py", line 8, in <module>
    a["title"]
KeyError: 'title'

Answer 1

title 嵌套在 json 对象的 results 下。

import requests

r = requests.get('https://api.mercadolibre.com/sites/MLA/search?q=gt%20710%20%20usado%20&sort=price_asc')
a = r.json()

for result in a['results']:
    print(result['title'])

输出

Gt 710 (1gb)  
Placa De Video Msi Geforce Gt 710 1gb
Placa De Video Nvidia Galax  Geforce 700 Series Gt 7102gb
Placa De Video Nvidia Gigabyte Geforce 700 Series Gt 710 2gb
Placa De Video Asus  Geforce 700 Series Gt 710-sl-2gd5 2gb
Placa De Video Nvidia Geforce Gt 740
Placa De Video Evga 710 1gb Ddr3 
Gtx 770 4gb Zotac 
Placa De Video Msi Geforce Gt 710 2gd3 Lp 2gb
Placa De Video Nvidia Msi  Geforce 700 Series Gt 710 Gt 710 
Placa De Video Nvidia Msi  Geforce 700 Series Gt 710 Gt 710 
Placa De Vídeo Nvidia Gt710
Placa De Video Msi Geforce Gt 710 1gb
Placa De Video Msigt710 
Placa De Video Nvidia Msi Gt 710
Asus Gt 710 
Placa De Vídeo Nvidia 
Placa De Video Nvidia Msi Gt 710 Gt 710 1gd3h Lp 1gb - Nueva
Placa De Video Msi Geforce Gt 710 1gb
Placa De Video Colorful Geforce Gt710 1gb Ddr3 Hdmi
Tarjeta Grafica
Asus Geforce Low Profile Gt 710 1gb Gddr5 + Cable Vga
Placa De Video Gt 710 2gb Ddr3 Gainward 3 Meses De Uso
Placa De Video Nvidia Geforce Gt 710 1gb Msi Casi Nueva
Placa De Video Nvidia Asus Geforce Gt 710 1gb
Placa De Video Gt 710 2gb Ddr3
Placa De Video Evga Gt 710 2 Gb Ddr3
Placa De Video Nvidia Msi Geforce Gt 710 1gd3h Lp 1gb
Placa De Video Msi Nvidia Gt 710 2gb Low Profile
Placa De Video Nvidia Msi  Geforce Gt 710 1gb Gddr3
Placa De Video Nvidia Gt 710 Low Profile
Nvidia Gt 710 2gb Pny
Placa De Video Gt710 1gb Gddr5
Gt 710 2gb
Nvidia Msi Gt 710 2gb
Nvidia Geforce Gt 710 2gb Ddr3
Placa De Video Nvidia Geforce Gt 710
Placa De Video Nvidia Asus  Geforce Gt 710 2gb Ddr5
Placa De Video Gt 710 2gb Galax
Placa De Video Nvidia Asus  Geforce 700 Series Gt 710 2gb
Tarjeta Grafica Geforce 710 2gb Nvidia
Msi Nvidia Gt 710 2gb Gddr3
Gigabyte Geforce Gt 710 2gb Ddr3 
Geforce Gt 710 2gb Asus 
Nvidia Msi Gt 710 2gb Ddr3 Low Profile. Nueva 3 Meses De Uso
Placa De Video Msi Gt 710 2gb
Placa De Video Nvidia Msi  Geforce 700 Series Gt 7102gb Ddr3
Placa De Video Gefroce Evga Gtx 750

无法从 api 中提取简单信息

Can't extract simple information from an api

python

api

request