How to activate virtual environment in python Linux code example

Example 1: python virtual environment

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

source env/bin/activate

#all this is on same directory

Example 2: start virtual environment python linux

source env/bin/activate

Example 3: activate venv linux

env/bin/activate

Example 4: how to activate python virtual environment

#open directory with terminal where you crated vertual environment
#example your venv name <visualscrapy>
teamspirit:~$ cd visualscrapy
#teamspirit:~/visualscrapy$  <-- output
#Now type bellow command
source ./bin/activate
#(visualscrapy) teamspirit:~/visualscrapy$   <-- output