'Creates the virtual environment and installs PIP.
Creates the virtual environment and installs PIP only into the
virtual environment.'

def create_virtualenv(self, no_site_packages=True):

    if (not os.path.isdir(self.venv)):
        print('Creating    venv...', end='    ')
        if no_site_packages:
            self.run_command(['virtualenv', '-q', '--no-site-packages', self.venv])
        else:
            self.run_command(['virtualenv', '-q', self.venv])
        print('done.')
    else:
        print('venv    already    exists...')
        pass
