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2023-06-21 05:00:20

pip install failed with "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)"

我对Python非常陌生，并试图在Windows 7上安装链接检查器。一些注意事项:

pip install is failing no matter the package. For example, > pip install scrapy also results in the SSL error. Vanilla install of Python 3.4.1 included pip 1.5.6. The first thing I tried to do was install linkchecker. Python 2.7 was already installed, it came with ArcGIS. python and pip were not available from the command line until I installed 3.4.1. > pip search linkchecker works. Perhaps that is because pip search does not verify the site's SSL certificate. I am in a company network but we do not go through a proxy to reach the Internet. Each company computer (including mine) has a Trusted Root Certificate Authority that is used for various reasons including enabling monitoring TLS traffic to https://google.com. Not sure if that has anything to do with it.

下面是运行pip install linkchecker后我的pip.log的内容:

Downloading/unpacking linkchecker
  Getting page https://pypi.python.org/simple/linkchecker/
  Could not fetch URL https://pypi.python.org/simple/linkchecker/: connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)
  Will skip URL https://pypi.python.org/simple/linkchecker/ when looking for download links for linkchecker
  Getting page https://pypi.python.org/simple/
  Could not fetch URL https://pypi.python.org/simple/: connection error: HTTPSConnectionPool(host='pypi.python.org', port=443): Max retries exceeded with url: /simple/ (Caused by <class 'http.client.CannotSendRequest'>: Request-sent)
  Will skip URL https://pypi.python.org/simple/ when looking for download links for linkchecker
  Cannot fetch index base URL https://pypi.python.org/simple/
  URLs to search for versions for linkchecker:
  * https://pypi.python.org/simple/linkchecker/
  Getting page https://pypi.python.org/simple/linkchecker/
  Could not fetch URL https://pypi.python.org/simple/linkchecker/: connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)
  Will skip URL https://pypi.python.org/simple/linkchecker/ when looking for download links for linkchecker
  Could not find any downloads that satisfy the requirement linkchecker
Cleaning up...
  Removing temporary dir C:\Users\jcook\AppData\Local\Temp\pip_build_jcook...
No distributions at all found for linkchecker
Exception information:
Traceback (most recent call last):
  File "C:\Python34\lib\site-packages\pip\basecommand.py", line 122, in main
    status = self.run(options, args)
  File "C:\Python34\lib\site-packages\pip\commands\install.py", line 278, in run
    requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
  File "C:\Python34\lib\site-packages\pip\req.py", line 1177, in prepare_files
    url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
  File "C:\Python34\lib\site-packages\pip\index.py", line 277, in find_requirement
    raise DistributionNotFound('No distributions at all found for %s' % req)
pip.exceptions.DistributionNotFound: No distributions at all found for linkchecker

当前回答

在我的情况下，这是由于SSL证书是由我公司的内部CA签署的。使用像pip——cert这样的变通方法并没有帮助，但是下面的包可以:

pip install pip_system_certs

参见:https://pypi.org/project/pip-system-certs/

这个包修补pip并在运行时请求使用来自默认系统存储的证书(而不是捆绑的certs ca)。 这将允许pip验证tls/ssl连接到您的系统安装信任的服务器。

2019-05-22 10:02:03

其他回答

短期解决方案:

easy_install <package name>

例如:

easy_install pandas

替代解决方案:

pip install <package_name> --trusted-host pypi.org --trusted-host files.pythonhosted.org

例子:

pip install pandas --trusted-host pypi.org --trusted-host files.pythonhosted.org
2020-01-23 12:58:36

我尝试了这个回答博客中提供的大多数解决方案，但是没有一个有效，我在尝试安装python包时遇到了这个ssl证书错误。

我通过以下命令成功执行:

python -m pip install PACKAGENAME --trusted-host=pypi.python.org --trusted-host=pypi.org --trusted-host=files.pythonhosted.org
2020-10-18 23:16:45

我通过更改代理设置来自动检测代理设置来解决这个问题。

2022-12-30 16:46:19

尽管有40个答案，但我认为没有一个完全解决了我的问题。

我在macOS Catalina 10.15.5上，在公司代理的后面。

在尝试安装或升级包时，提示以下错误

>>> pip install <package name>                                                                                                                           

Looking in indexes: https://pypi.org/simple, https://data:****@pypi.<company>.com/simple/
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1108)'))': <package name>
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1108)'))': <package name>

@Steve_Tauber的回答pip——cert /etc/ssl/certs/FOO_Root_CA。Pem安装链接检查器让我的方式有一部分。

我能够使用现有的cert文件成功安装包，如下所示:

pip install --cert /Users/me/opt/anaconda3/ssl/cert.pem --upgrade pip

但是我不想每次使用pip时都使用cert标志…

答案是更新环境变量:

CERT_PATH=/Users/me/opt/anaconda3/ssl/cert.pem
export SSL_CERT_FILE=${CERT_PATH}
export REQUESTS_CA_BUNDLE=${CERT_PATH}

现在我可以安装了。

2021-05-18 09:38:38

对我来说，这是因为以前我正在运行脚本，设置代理(到提琴手)，重新打开控制台或重新启动修复问题。

2017-03-30 21:36:45

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