Q : pip install fails with "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)"
pip install gensim config --global http.sslVerify false
Just install any package with the "config --global http.sslVerify false" statement
$ pip install --trusted-host pypi.org --trusted-host pypi.python.org --trusted-host files.pythonhosted.org <package_name>
Note: Sometime during April 2018, the Python Package Index was migrated from
pypi.org. This means "trusted-host" commands using the old domain no longer work, but you can add both.
Since the release of pip 10.0, you should be able to fix this permanently just by upgrading
$ pip install --trusted-host pypi.org --trusted-host pypi.python.org --trusted-host files.pythonhosted.org pip setuptools
Or by just reinstalling it to get the latest version:
$ curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
(… and then running
get-pip.py with the relevant Python interpreter).
pip install <otherpackage> should just work after this. If not, then you will need to do more, as explained below.
You may want to add the trusted hosts and proxy to your config file.
pip.ini (Windows) or
[global] trusted-host = pypi.python.org pypi.org files.pythonhosted.org
Alternate Solutions (Less secure)
Most of the answers could pose a security issue.
Two of the workarounds that help in installing most of the python packages with ease would be:
- Using easy_install: if you are really lazy and don't want to waste much time, use
easy_install <package_name>. Note that some packages won't be found or will give small errors.
- Using Wheel: download the Wheel of the python package and use the pip command
pip install wheel_package_name.whlto install the package.