SSL：使用 Bigquery 的 CERTIFICATE_VERIFY_FAILED

Question

我正在尝试在 Python 环境中从 Bigquery 查询数据。

我使用服务帐户通过 Bigquery 网站上的 this step 创建了我的凭据，并使用了以下代码。

from google.cloud import bigquery

client = bigquery.Client()
SQLCommand = '''
             Some sql command '''

query_results = client.run_sync_query(SQLCommand)
query_results.run()

但是，我遇到了以下错误，我不确定在哪里可以解决此问题。任何建议将不胜感激！

Traceback (most recent call last):

File "<ipython-input-11-88c61e8cf342>", line 1, in <module>
  query_results.run()

File "c:\users\xxxx\appdata\local\continuum\anaconda\lib\site-    packages\google_cloud_bigquery-0.24.0-py2.7.egg\google\cloud\bigquery\query.py", line 364, in run
method='POST', path=path, data=self._build_resource())

File "c:\users\xxxx\appdata\local\continuum\anaconda\lib\site-packages\google_cloud_core-0.24.1-py2.7.egg\google\cloud\_http.py", line 299, in api_request
headers=headers, target_object=_target_object)

File "c:\users\xxxx\appdata\local\continuum\anaconda\lib\site-packages\google_cloud_core-0.24.1-py2.7.egg\google\cloud\_http.py", line 193, in _make_request
return self._do_request(method, url, headers, data, target_object)

File "c:\users\xxxx\appdata\local\continuum\anaconda\lib\site-packages\google_cloud_core-0.24.1-py2.7.egg\google\cloud\_http.py", line 223, in _do_request
body=data)

File "build\bdist.win-amd64\egg\google_auth_httplib2.py", line 187, in request
self._request, method, uri, request_headers)

File "c:\users\xxxx\appdata\local\continuum\anaconda\lib\site-packages\google_auth-1.0.1-py2.7.egg\google\auth\credentials.py", line 121, in before_request
self.refresh(request)

File "c:\users\xxxx\appdata\local\continuum\anaconda\lib\site-packages\google_auth-1.0.1-py2.7.egg\google\oauth2\service_account.py", line 310, in refresh
request, self._token_uri, assertion)

File "c:\users\xxxx\appdata\local\continuum\anaconda\lib\site-packages\google_auth-1.0.1-py2.7.egg\google\oauth2\_client.py", line 143, in jwt_grant
response_data = _token_endpoint_request(request, token_uri, body)

File "c:\users\xxxx\appdata\local\continuum\anaconda\lib\site-packages\google_auth-1.0.1-py2.7.egg\google\oauth2\_client.py", line 104, in _token_endpoint_request
method='POST', url=token_uri, headers=headers, body=body)

File "build\bdist.win-amd64\egg\google_auth_httplib2.py", line 119, in __call__
raise exceptions.TransportError(exc)

TransportError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:661)
[1]: https://cloud.google.com/docs/authentication/getting-started

Answer 1

我怀疑这不是 BigQuery 特定的，这个问题的答案之一可能是相关的：

urllib and "SSL: CERTIFICATE_VERIFY_FAILED" Error

基本上，根证书不会与某些 Python 版本一起默认安装，您需要将其作为安装后步骤的一部分。没有根证书，HTTPS 客户端无法检查远程服务器的身份。

短版，您可能需要这样做（取自链接的问题）：

“自述文件将让您运行这个安装后脚本，它只安装证书：/Applications/Python\ 3.6/Install\ Certificates.command”