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。

其他回答

对我来说,创建一个文件夹就解决了这个问题 Pip,有一个文件:Pip .ini 在 C:\Users\ <用户名> \ AppData \ \徘徊 例句:

C:\Users\<username>\AppData\Roaming\pip\pip.ini

我在信里写道:

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

我重新启动python,然后pip永久信任这些站点,并使用它们下载包。

如果你在windows上找不到AppData文件夹,在文件资源管理器中写入% AppData %,它就会出现。

在我的例子中,我在最小的alpine docker映像中运行Python。缺少根CA证书。解决办法:

Apk更新& Apk添加ca-certificates

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。

只是把这个放在这里,因为我没有看到其他人提到它。

你可以像这样设置全局可信主机为pip:

py -m pip config set global.trusted-host pypi.org

最重要的是,它将返回放置pip.ini/pip.conf的正确位置

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