Answers for "activate an environment in python"

python virtual environment

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

source env/bin/activate

#all this is on same directory

activate virtual environment python

Install venv with this command:
	pip install virtual env
    
Create a directory and type the following command in terminal:
	python -m venv virtual <-- "The last word in command is the name of the venv, you can call it whatever you want."
    
Activate virtual environment:
	source virtual/bin/activate

activate venv in python

$ virtualenv venv --distribute
New python executable in venv/bin/python
Installing distribute.........done.
Installing pip................done.
$ source venv/bin/activate
(venv)$ python