SSL certificate verify failed using pip to install packages

Question

I am trying to install the Scrapy package  among others  for python using pip  I have tried doing the installation using python 3 and python 2  I have installed upgraded the setuptools like so    pip3 install --upgrade setuptools  I have tried to use the --trusted-host option like so    pip3 install --trusted-host pypi python org Scrapy  But I always get the same error message when I run   pip3 install Scrapy  The complete output is this   Collecting Scrapy   Using cached Scrapy-1 3 2-py2 py3-none-any whl Collecting PyDispatcher gt  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 gt  1 15 0  from Scrapy    Using cached w3lib-1 17 0-py2 py3-none-any whl Collecting parsel gt  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 gt  1 5 2 in  Library Frameworks Python framework Versions 3 6 lib python3 6 site-packages  from Scrapy  Collecting Twisted gt  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 gt  16 10 1     Traceback  most recent call last         File   lt string gt    line 1  in  lt module gt        File   private var folders gy 5xt04 452z791v1qjs1yzxkh0000gn T pip-build-nkv4jozy Twisted setup py   line 21  in  lt module gt          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 gt  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    I am on a mac OS version 10 12 1 and am using python 3 6  Does anybody know a solution to this problem

User · Answer

If you re using python3  you can try this too   python3 -m pip install --upgrade Scrapy --trusted-host pypi org --trusted-host files pythonhosted org

User · Answer

It looks like they are also using pypi org now   I added the following to  appdata  pip pip ini and was able to download my packages from behind an HTTPS-intercepting proxy   trusted-host   pypi python org files pythonhosted org pypi org

User · Answer

pip3 install --trusted-host pypi org --trusted-host files pythonhosted org  lt app gt

User · Answer

One note on the above answers  it is no longer sufficient to add just pypi python org to the trusted-hosts in the case where you are behind an HTTPS-intercepting proxy  we have zScaler    I currently have the following in my pip ini   trusted-host   pypi python org pypi org files pythonhosted org   Running pip -v install pkg will give you some hints as to which hosts might need to be added

User · Answer

If adding pypi python org as a trusted host does not work  you try adding files pythonhosted org  For example  python -m pip install --upgrade --trusted-host files pythonhosted org  lt package-name gt

User · Answer

You can try sudo apt-get upgrade to get the latest packages  It fixed the issue on my machine

User · Answer

As stated here https   bugs python org issue28150 in previous versions of python Apple supplied the OpenSSL packages but does not anymore    Running the command pip install certifi and then pip install Scrapy fixed it for me

User · Answer

pip install --trusted-host pypi python org autopep8  any package name    This command will add pypi python org to the trusted sources and will install all the required package   I ran into the error myself and typing this command helped me install all the pip packages of python

User · Answer

It seems that Scrapy fails because installing Twisted fails  which fails because incremental fails   Running pip install --upgrade pip  amp  amp  pip install --upgrade incremental fixed this for me

User · Answer

I had same issue  I was trying to install mysqlclient for my Django project   In my case the system date time wasn t up-to date  Windows 8   That s causing the error  So  updated my system date time and ran the command pip install mysqlclient again  And it did the work   Hope this would be helpful for those people who re executing all the commands out there  suggesting in other answers  without checking their system date time

User · Answer

Something to try --- tell python to not use https with the index directive and a http    address  not https       pip install --index-url http   pypi python org simple  --trusted-host pypi python org  Scrapy   You may be behind a corporate firewall and Ive have experiences where even the above failed  though Im not going to pretend like I know enough about firewalls or SSL to understand why  In that case the only way I was able to get around that was to get a certificate file and pass it to python  See kenorb   s answer here for details

User · Answer

Pretty unique case here  but having Fiddler running  not even targeting the same process  gave me the same SSL errors  Running pip install with --verbose showed an error with Fiddler  closing Fiddler immediately fixed the issue

User · Answer

In Windows 10   search the drive you have installed the conda or it should be in C  Users name AppData Roaming pipright with your mouse right click and select edit with notepad leave the  global  and replace what ever you have in there with blow code  Ctrl s and rerun the code  it should work    trusted-host   pypi python org pypi org files pythonhosted org

User · Answer

Thank you for the solution  In my case the file  appdata  pip pip ini was not present  I created it manually with this content    global  trusted-host   pypi python org files pythonhosted org pypi org pypi io

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