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

这对我来说很管用:

$ sudo mv /etc/ssl/cert.pem /etc/ssl/cert.pem.BAK

在我的情况下，我在安装pip时得到了相同的错误，在尝试运行aws CLI命令时也出现了类似的错误。这一周一切正常，下一周就不正常了。AFAIK，我没有安装任何会破坏SSL的东西。

我在MacOS大苏尔，尝试了不同版本的Python 3。通过pyenv和Brew安装。我尝试了这篇文章中列出的所有相关解决方案。我甚至重新安装了操作系统，但还是不行。

2021-07-04 22:31:42

其他回答

在连接中设置代理，然后运行:

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py --proxy proxy:80

2021-09-10 15:48:45

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

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

你有4个选择:

使用证书作为参数

$ pip install --cert /path/to/mycertificate.crt linkchecker

使用pip.conf中的证书

创建这个文件:

$HOME/.pip/pip.conf (Linux)

%HOME%\pip\pip.ini (Windows)

然后加上这几行:

[global]
cert = /path/to/mycertificate.crt

忽略证书并使用HTTP

$ pip install --trusted-host pypi.python.org linkchecker

忽略证书，在pip.conf中使用HTTP

创建这个文件:

$HOME/.pip/pip.conf (Linux)

%HOME%\pip\pip.ini (Windows)

然后加上这几行:

[global]
trusted-host = pypi.python.org

源

https://pip.pypa.io/en/latest/user_guide/#configuration

2018-04-20 15:44:12

我尝试使用公司代理，但失败了。

我使用的是Python 3.6。

Pip.conf文件丢失。

下面是解决这个问题的步骤:

安装证书包:-pip——truste- host pypi.python.org——truste- host files.pythonhosted.org——truste- host pypi.org 创建一个pip.conf文件，如下所示:

     $ cd ~/.config 
     $ mkdir pip
     $ cd pip
     $ nano pip.conf

将以下内容添加到新创建的.conf文件中，并保存。

[global]
trusted-host = pypi.python.org files.pythonhosted.org pypi.org pypi.io

一切都完成了，它开始工作了。

2021-02-12 05:22:43

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

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