“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

Answer 1

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

Answer 2

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 <package-name>

Answer 3

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

Answer 4

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

Answer 5

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

Answer 6

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.