Python - 类型错误：不可散列类型：“切片”错误

Question

I'm trying to access an API with this code:

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)

When I put [:4] in for x in date['valores'][:4]: , I get the following error:

TypeError: unhashable type: 'slice' error

Answer 1

I'm gonna take a guess as to this is what you want:

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'])