我正试图从这个网站提取数据：stlouisfed。我试图提取的数据是“BofA Merrill Lynch US Corp BBB总回报指数值”。
出于某种原因，由于某些url错误，我的代码在一段时间内正确编译后不再编译。我申请了一个新的API密钥，但这似乎也没有用。
这是我的代码：
# Modules
import urllib
import requests
import xml.etree.ElementTree as ET
# api_key='ea255f1e20c1da2f283a3f718a5d9483'
# id="BAMLCC0A4BBBTRIV"
# Daily
link = "https://api.stlouisfed.org/fred/series?series_id=BAMLCC0A4BBBTRIV&api_key=ea255f1e20c1da2f283a3f718a5d9483&frequency=d"
f = urllib.request.urlopen(link)
myfile = f.read()
html = urllib.request.urlopen(link).read()
root = ET.fromstring(html)
myfile = open('Daily.csv', 'w')
for child in root:
myfile.write(child.attrib['date'] + ',' + child.attrib['value'] + '\n')
myfile.close()
# Quartely
link1 = "https://api.stlouisfed.org/fred/series/observations?series_id=BAMLCC0A4BBBTRIV&api_key=ea255f1e20c1da2f283a3f718a5d9483&frequency=q"
f1 = urllib.request.urlopen(link1)
myfile1 = f1.read()
html1 = urllib.request.urlopen(link1).read()
root1 = ET.fromstring(html1)
myfile1 = open('Quartely.csv', 'w')
for child in root:
myfile1.write(child.attrib['date'] + ',' + child.attrib['value'] + '\n')
myfile1.close()
这是我得到的错误：
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 1318, in do_open
encode_chunked=req.has_header('Transfer-encoding'))
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1239, in request
self._send_request(method, url, body, headers, encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1285, in _send_request
self.endheaders(body, encode_chunked=encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1234, in endheaders
self._send_output(message_body, encode_chunked=encode_chunked)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1026, in _send_output
self.send(msg)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 964, in send
self.connect()
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/http/client.py", line 1400, in connect
server_hostname=server_hostname)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 407, in wrap_socket
_context=self, _session=session)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 814, in __init__
self.do_handshake()
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 1068, in do_handshake
self._sslobj.do_handshake()
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/ssl.py", line 689, in do_handshake
self._sslobj.do_handshake()
ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777)
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/Users/MorganWeiss/Desktop/Jobs:Applications/BOFA/assetmark.py", line 13, in <module>
f = urllib.request.urlopen(link)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 223, in urlopen
return opener.open(url, data, timeout)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 526, in open
response = self._open(req, data)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 544, in _open
'_open', req)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 504, in _call_chain
result = func(*args)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 1361, in https_open
context=self._context, check_hostname=self._check_hostname)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/urllib/request.py", line 1320, in do_open
raise URLError(err)
urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:777)>