How to create a venv for a specific Python version: $ python3.7 # newly-installed Python 3.7 package Type "help", "copyright", "credits" or "license" for more information. cd /mnt/Vancouver/apps/python_versions/src/Python-3.7.4/Įxamine installed Python versions: $ which python mnt/Vancouver/apps/python_versions/src/Python-3.7.4/
#Youtube testout 2.7.9 archive
I then extracted that archive (source files) to mnt/Vancouver/apps/python_versions/src/Python-3.7.4.tgz I downloaded the Python 3.7.4 source files from
#Youtube testout 2.7.9 install
Python 3.7 was no longer on the system, so I could not downgrade Python, to install a package that I needed.įurthermore, I wanted to use that package / Python 3.7 inside a virtual environment (venv). I needed to install a Python 3.7 environment (env) on my Python 3.8-based Arch Linux system. That keeps all your environments in one place. Unlike virtualenv, virtualenvwrapper will create the environment at the location specified by the $WORKON_HOME environment variable. Removes the 'bin' directory of the environment activated with 'source
Running virtualenv with interpreter /usr/local/bin/python3 Source /Library/Frameworks/amework/Versions/2.7/bin/virtualenvwrapper.shĢ) The -p option works differently with virtualenvwrapper: I have to specify the full path to the python interpreter to be used in the new environment(when I do not want to use the default python version): $ mkvirtualenv -p /usr/local/bin/python3.2 my_env #source /usr/local/bin/virtualenvwrapper.sh This is what I ended up putting in ~/.bash_profile: export WORKON_HOME=$HOME/.virtualenvsĮxport PROJECT_HOME=$HOME/django_projects #Not very important - mkproject command uses thisĮxport VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python2.7 =VIRTUALENVWRAPPER=ġ) I had some problems getting virtualenvwrapper to work. Virtualenv just copies python from a location on your computer into the newly created my_env/bin/ directory.Ģ) The system python is in /usr/bin, while the various python versions I installed were, by default, installed into: /usr/local/binģ) The various pythons I installed have names like python2.7 or python3.2, and I can use those names rather than full paths. which you can use to install other packages. Will contain the Python executable files, and a copy of the pip Virtualenv my_env will create a folder in the current directory which New python executable in my_env/bin/python Running virtualenv with interpreter /usr/local/bin/python3.2 However, you can specify any version of python installed on your computer to use inside a new environment with the -p flag: $ virtualenv -p python3.2 my_env You can see the python version in the output.īy default, that will be the version of python that is used for any new environment you create. /./Library/Frameworks/amework/Versions/2.7/bin/pip Lrwxrwxr-x 1 root admin 65 /usr/local/bin/pip -> 1) When you do pip install virtualenv, the pip command is associated with one of your python versions, and virtualenv gets installed into that version of python.
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