Python virtualenv cheat sheet

Aim

• Install and use python through virtualenv

Steps

• Install python2 and python3
• Set up python2 workspace
• activate
• do things
• deactivate
• Set up python3 workspace

$ sudo apt-get install python python3 python-dev python3-dev
$ sudo apt-get install python-virtualenv
$ sudo apt install python-pip
$ sudo apt install python3-pip
# python 2 environment
$ mkdir -p ./python-apps/env_python2
$ cd ./python-apps/env_python2
$ virtualenv .
$ source ./app/activate
#
# Do what you want
#
$ deactivate
# python 3 environment
$ mkdir -p ./python-apps/env_python3
$ cd ./python-apps/env_python3
$ virtualenv -p python3 .
$ source ./app/activate
#
# Do what you want
#
$ deactivate

Python virtualenv windows

# Install python in windows, remember to add python to Path
# open cmd.exe

$ pip install virtualenv

# Go to the working folder
$ virtualenv venv
$ C:\Your working folder\venv\Scripts\activate.bat

# Now you are in the virtualenv

 Python autocomplete in spacemacs

• Create virtualenv in any folder
• In spacemacs press SPC-mVa, then select the virtualenv
• DONE

To make this work, you have to make sure the binary python is under <Your selected folder/bin> . If spacemacs cannot find the binary, you will see error message, (file-missing Searching for program No such file or directory python)