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

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

其他回答

首先，

    pip install --trusted-host pypi.python.org <package name>

对我没用。我一直得到CERTIFICATE_VERIFY_FAILED错误。然而，我在错误消息中注意到他们引用了“pypi.org”站点。因此，我使用this作为可信主机名，而不是pypi.python.org。这句话几乎把我带到了那里;使用CERTIFICATE_VERIFY_FAILED加载仍然失败，但在稍后的时间点。找到了失败的网站的引用，我把它作为一个可信任的主机。最终对我有用的是:

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

2018-04-23 16:50:41

如果MacOS对你和你没什么帮助。只需查看python文件夹并运行Install Certificates.command 只有这个对我有帮助。

2022-09-16 13:00:40

到现在为止，当pip升级到10，现在他们已经把路径从pypi.python.org更改为files.pythonhosted.org 请将命令更新为pip——trusted-host files.pythonhosted.org install python_package

2018-04-23 10:26:32

永久固定pip配置

我有ssl问题，由于公司网络安全相关的netscope。我的机器是windows 10, python 3.9，下面的命令对我有用。

pip config set global.trusted-host \
    "pypi.org files.pythonhosted.org pypi.python.org" \
    --trusted-host=pypi.python.org \
    --trusted-host=pypi.org \
    --trusted-host=files.pythonhosted.org

在这里，pip永久信任这些站点，现在我们可以使用它们下载任何包。

2021-06-01 22:42:53

或者，如果什么都不行(就像我的情况)，你可以恢复到搜索和下载whl文件这里:

https://pypi.org/project/fileDownloader.py/

在通过pip安装它之前，使用下载的文件，不再需要任何证书:

python3.7 -m pip install Myfile.whl

2021-01-26 15:05:06

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

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