pip3 installs inside virtual environment with python3.6 failing due to ssl module not available
I followed the below steps for python3.6 installation in ubuntu 14.04 and virtualenv pip installs works fine.
Python 3.6 Installation:
sudo apt-get install python3-dev libffi-dev libssl-dev
wget https://www.python.org/ftp/python/3.6.0/Python-3.6.0.tgz
tar xvf Python-3.6.0.tgz
cd Python-3.6.0
./configure --enable-optimizations
make -j8
sudo make altinstall
python3.6
If seeing the following error --
zipimport.ZipImportError: can't decompress data; zlib not available make: *** [altinstall] Error 1
try:
sudo apt-get install zlib1g-dev
Validation:
Create virtualenv in python3.6:
python3.6 -m venv testenv
source testenv/bin/activate
pip install pep8
using pip:
(testenv) vagrant@pvagrant-dev-vm:~$ pip install pep8
*Collecting pep8
Downloading pep8-1.7.0-py2.py3-none-any.whl (41kB)
100% |████████████████████████████████| 51kB 4.1MB/s
Installing collected packages: pep8
Successfully installed pep8-1.7.0*
(testenv) vagrant@pvagrant-dev-vm:~$ pip list
pep8 (1.7.0)
pip (9.0.1)
setuptools (28.8.0)
I stumbled upon the same issue when I tried to create a virtual environment utilising python3.6.0. Here is my solution for Mac OS X 10.12.2 (Py_minion comment was pretty close):
Setup
I created the environment by the following steps: downloading python3.6.0 running
./configure --prefix=<some_path>`
make
make install
mkvirtualenv --python=<some_path/bin/python3.6> foo
So basically similar to: https://stackoverflow.com/a/11301911/1286093
An indication if you have the same issue as I had would be a similar line when running make
The necessary bits to build these optional modules were not found: _ssl
Solution
Install openssl
brew install openssl
brew unlink openssl && brew link openssl --force
Change Module/Setup or Module/Setup.dist
You can find those files in the directory of the downloaded Python version.
Comment in and, if necessary change, lines 209 - 211 (I had to change the SSL variable to my openssl location).
SSL=/usr/local/opt/openssl <---- THIS DEPENDS ON YOUR INSTALLATION
_ssl _ssl.c \
-DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
-L$(SSL)/lib -lssl -lcrypto
Given that this was the location of openssl
Set environment variables
export CFLAGS="-I$(brew --prefix openssl)/include"
export LDFLAGS="-L$(brew --prefix openssl)/lib"
make and install again
Running
./configure --prefix=<some_path>`
make
make install
mkvirtualenv --python=<some_path/bin/python3.6> foo
again did the trick for me