PYTHON

virtualenv

pip install virtualenv
# Creating a virtual env.
virtualenv myvirtualenv
# activating
source env/bin/activate
# on windows 
.envScriptsactivate

python venv

# Ubuntu/Debian
apt-get install python3-venv
python3 -m venv .venv
source .venv/bin/activate

# python 2
python -m virtualenv env

venv python

python3 -m venv env    # create env
source env/bin/activate    # activate env
deactivate    # deactivate env
rm -r env/    # delete env in Linux
pip freeze    # show all packages installed
pip install -r requirements.txt   # install all packages
pip freeze > requirements.txt    # create automatically requirements.txt

python venv

#------FOR LINUX/MAC---------#
sudo apt-get install build-essential libssl-dev libffi-dev python-dev #installing requirements
sudo apt-get install -y python3-venv #installing venv 
python3 -m venv env #creating virtual env
source env/bin/activate #activating virtual env


#-------FOR WINDOWS----------# 
py -m pip install --user virtualenv #installing venv
py -m venv env #creating virtual env
.envScriptsactivate #activating virtual env

python venv

### install virtualenvwrapper ###
pip install virtualenvwrapper-win
### Add an environment variable WORKON_HOME to specify the path to store environments. By default, this is %USERPROFILE%Envs. ###

### ↓↓↓ use cmd or cmder (don't use ps terminal) for any of the following commands ↓↓↓ ###

### list venvs ###
lsvirtualenv

### create venv (automatically activated after creation) ###
mkvirtualenv <name>

### remove venv ###
rmvirtualenv <name>

### activate venv ###
workon <name>

### deactivate venv ###
deactivate


### General Syntax ###
mkvirtualenv [-a project_path] [-i package] [-r requirements_file] [virtualenv options] <name>

python virtualenv

python -m venv my_env
source my_env/bin/activate

python virtualenv

python -m venv my_env

python virtualenv venv

python -m venv venv

virtualenv

virtualenv env
envScriptsactivate
deactivate env

virtualenv

sudo apt install python3-venv

python3 -m venv my-project-env

source my-project-env/bin/activate

python venv

python -m venv flask_env  # Creating an isolated environment
source flask_env/bin/activate # Activate virtual environment
deactivate #deactivate

virtualenv

# installs PIP globally
curl https://bootstrap.pypa.io/get-pip.py | python

# installs virtualenv globally
pip install virtualenv

# creates a virtualenv
virtualenv -p python2.7 venv

# activates the virtualenv
source venv/bin/activate

virtualenv

# in terminal -
pip install virtualenv
virtualenv env # or any other name
envScriptsActivate

python venv

python3 -m venv tutorial-env
// start it 
source tutorial-env/bin/activate
// end it 
deactivate

python venv

source <folder-env>/bin/activate

virtualenv

pip install virtualenv env_name #creating env
source env_name/bin/activate #activate env
deactivate #closing/ deactivating env

Virtualenv

virtualenv venv --system-site-packages

virtualenv

pip install virtualenvwrapper-win
#for installing virtualenv package

mkvirtualenv [mkvirtualenv-options] [virtualenv-options] <name>
#creating a virtualenv

workon <env name>
#using virtualenv

Virtualenv

cd my-project/
virtualenv venv

Virtualenv

pip install <package>