使用pip安装包的“SSL证书验证失败”

问题描述：

我正在尝试使用pip为python安装Scrapy包（以及其他）。我已经尝试使用python 3和python 2进行安装，我已经安装/升级了setuptools，如下所示：$ pip3 install --upgrade setuptools，我试图使用--trusted-host选项，如下所示：$ pip3 install --trusted-host pypi.python.org Scrapy。但是当我运行$ pip3 install Scrapy时，我总是收到相同的错误消息。完整的输出是这样的：使用pip安装包的“SSL证书验证失败”

Collecting Scrapy 
    Using cached Scrapy-1.3.2-py2.py3-none-any.whl 
Collecting PyDispatcher>=2.0.5 (from Scrapy) 
    Using cached PyDispatcher-2.0.5.tar.gz 
Collecting service-identity (from Scrapy) 
    Using cached service_identity-16.0.0-py2.py3-none-any.whl 
Collecting pyOpenSSL (from Scrapy) 
    Using cached pyOpenSSL-16.2.0-py2.py3-none-any.whl 
Collecting w3lib>=1.15.0 (from Scrapy) 
    Using cached w3lib-1.17.0-py2.py3-none-any.whl 
Collecting parsel>=1.1 (from Scrapy) 
    Using cached parsel-1.1.0-py2.py3-none-any.whl 
Collecting queuelib (from Scrapy) 
    Using cached queuelib-1.4.2-py2.py3-none-any.whl 
Requirement already satisfied: six>=1.5.2 in /Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages (from Scrapy) 
Collecting Twisted>=13.1.0 (from Scrapy) 
    Using cached Twisted-17.1.0.tar.bz2 
    Complete output from command python setup.py egg_info: 
    Download error on https://pypi.python.org/simple/incremental/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749) -- Some packages may not be found! 
    Couldn't find index page for 'incremental' (maybe misspelled?) 
    Download error on https://pypi.python.org/simple/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:749) -- Some packages may not be found! 
    No local packages or working download links found for incremental>=16.10.1 
    Traceback (most recent call last): 
     File "<string>", line 1, in <module> 
     File "/private/var/folders/gy/5xt04_452z791v1qjs1yzxkh0000gn/T/pip-build-nkv4jozy/Twisted/setup.py", line 21, in <module> 
     setuptools.setup(**_setup["getSetupArgs"]()) 
     File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/distutils/core.py", line 108, in setup 
     _setup_distribution = dist = klass(attrs) 
     File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/setuptools/dist.py", line 317, in __init__ 
     self.fetch_build_eggs(attrs['setup_requires']) 
     File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/setuptools/dist.py", line 372, in fetch_build_eggs 
     replace_conflicting=True, 
     File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pkg_resources/__init__.py", line 851, in resolve 
     dist = best[req.key] = env.best_match(req, ws, installer) 
     File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1123, in best_match 
     return self.obtain(req, installer) 
     File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1135, in obtain 
     return installer(requirement) 
     File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/setuptools/dist.py", line 440, in fetch_build_egg 
     return cmd.easy_install(req) 
     File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/setuptools/command/easy_install.py", line 668, in easy_install 
     raise DistutilsError(msg) 
    distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('incremental>=16.10.1') 

    ---------------------------------------- 
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/gy/5xt04_452z791v1qjs1yzxkh0000gn/T/pip-build-nkv4jozy/Twisted/

我在一个mac操作系统版本10.12.1和我使用python 3.6。有没有人知道这个问题的解决方案？

你在公司防火墙后面吗？ –

可能重复的[pip安装失败，连接错误：\ [SSL：CERTIFICATE \ _VERIFY \ _FAILED \]证书验证失败（\ _ssl.c：598）“]（http://*.com/questions/25981703/ pip-install-fails-with-connection-error-ssl-certificate-verify-failed-certi） gbtimmon

@ Scratch'N'Purr，不，我不是 – imc

答

如前所述https://bugs.python.org/issue28150在以前版本的python中Apple提供了OpenSSL包，但现在已经不存在了。

运行命令pip install certifi然后pip install Scrapy固定对我来说

答

一些尝试---告诉Python不使用https与索引指令和HTTP：//地址（没有使用https：//）

pip install --index-url=http://pypi.python.org/simple/ --trusted-host pypi.python.org Scrapy

你可能是一个企业防火墙和伊夫背后有经验，即使上述失败，但我不会假装我知道足够的防火墙或SSL知道为什么。在那种情况下，我能够解决的唯一方法是获得一个证书文件并将其传递给python。有关详细信息，请参阅kenorb’s answer。

答

pip install --trusted-host pypi.python.org autopep8 (any package name)

此命令将增加pypi.python.org的可信来源，并安装所有必需的包。

我自己遇到了错误，输入这个命令帮助我安装了python的所有pip软件包。

使用pip安装包的“SSL证书验证失败”

相关推荐