我正在尝试学习从 API 请求、加载和解析 Json 数据。 我收到一个值错误

Question

在解析和写入 CSV 之前，我一直在尝试学习从 API 检索 Json 数据。 我尝试了多种方法，但是我一直卡在第一个障碍上。 使用下面的代码，我在尝试从 URL 检索数据时收到预期值错误。 我错过了什么？

代码

import requests
import pandas as pd
import json
import pprint
import seaborn as sns
import matplotlib.pyplot as plt

base_url="https://data.sec.gov/api/xbrl/companyfacts/CIK0001627475.json"
first_response=requests.get(base_url)
response_list=first_response.json()

错误信息

        JSONDecodeError                    Traceback (most recent call last)
<ipython-input-7-10ae360550df> in <module>
      1 base_url="https://data.sec.gov/api/xbrl/companyfacts/CIK0001627475.json"
      2 first_response=requests.get(base_url)
----> 3 response_list=first_response.json()

~\Anaconda3\lib\site-packages\requests\models.py in json(self, **kwargs)
    898                     # used.
    899                     pass
--> 900         return complexjson.loads(self.text, **kwargs)
    901 
    902     @property

~\Anaconda3\lib\json\__init__.py in loads(s, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw)
    355             parse_int is None and parse_float is None and
    356             parse_constant is None and object_pairs_hook is None and not kw):
--> 357         return _default_decoder.decode(s)
    358     if cls is None:
    359         cls = JSONDecoder

~\Anaconda3\lib\json\decoder.py in decode(self, s, _w)
    335 
    336         """
--> 337         obj, end = self.raw_decode(s, idx=_w(s, 0).end())
    338         end = _w(s, end).end()
    339         if end != len(s):

~\Anaconda3\lib\json\decoder.py in raw_decode(self, s, idx)
    353             obj, end = self.scan_once(s, idx)
    354         except StopIteration as err:
--> 355             raise JSONDecodeError("Expecting value", s, err.value) from None
    356         return obj, end

JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Answer 1

有些请求成功，有些则不成功，因此您可以尝试：

import requests
import json

base_url = "https://data.sec.gov/api/xbrl/companyfacts/CIK0001627475.json"

succeed = False

while not succeed:
    response = requests.get(base_url)
    try:
        dict_response = json.loads(response.text)
        succeed = True
    except:
        pass