Command line only (Linux)

Put this in your ~/.bashrc and create the virtual env with name 'venv' inside the project root:

function cd() {
  if [[ -d ./venv ]] ; then
    deactivate
  fi

  builtin cd $1

  if [[ -d ./venv ]] ; then
    . ./venv/bin/activate
  fi
}

When cd-ing into a directory, it searches for a virtualenv named venv and disables when leaving.

Alternative with absolute paths (Linux and Windows)

In cases where you want to run the script without a bash, you could run it with the absolute path to the python interpreter inside the virtualenv.

This is from inside the project dir:

# Posix:
/path/to/virtualenvname/bin/python run.py

# Windows:
C:\path\to\virtualenvname\Scripts\python.exe run.py

Or if you want to execute it from outside of the project dir:

# Posix:
/path/to/virtualenvname/bin/python /path/to/projectdir/run.py

# Windows:
C:\path\to\virtualenvname\Scripts\python.exe C:\path\to\projectdir\run.py

Okk So i got your point what i think is why not to add some function in your code so that whenever you excute it it will automatically use vitual environment

--code for linux

import os

os.system("source <virtualenv_name>/bin/activate")

--code for windows

import os

os.system("<virtualenv_name>/bin/activate")

And at last line add

os.system("deactivate")

Add these lines to beginning of your programm see if it works.

May this help you solving your probelem

Thanks!!