Python TypeError:不可损坏的类型：“slice”

Question

我正在尝试使用以下代码访问API：

import requests
import json

req = requests.get('http://api.promasters.net.br/cotacao/v1/valores')
date = json.loads(req.text)
data = req.json()

for x in date['valores'][:4]:
  coin = x['moeda']
  print(coin)

当我将[:4]放入for x in date['valores'][:4]:时，我得到以下错误：

TypeError: unhashable type: 'slice' error

Answer 1

我来猜猜这是你想要的：

import requests
import json

req = requests.get('http://api.promasters.net.br/cotacao/v1/valores')
date = json.loads(req.text)
data = req.json()

for x in list(date['valores'].items())[:4]:
    print(x[0], x[1]['valor'])