Answers for "install python3 virtualenv"

install virtualenv

pip install virtualenv

activate it by doing this:
cd myproject/Scripts/activate

python virtual environment

python3 -m venv env
python -m virtualenv env #py2

source env/bin/activate

#all this is on same directory

creating venv python3

# CREATE FOLDER FOR A PROJECT
mkdir project_folder
cd project_folder

# CREATE VIRTUAL ENVIRONMENT
python3.7 -m venv myvenv 
# or alternativelly
virtualenv myvenv --python=python3.7

# ACTIVATE VIRTUAL ENVIRONMENT
source myvenv/bin/activate

pip3 venv install

python3 -m venv /path/to/new/virtual/environment
source <venv>/bin/activate

install virtualenv Python

cd my_project