Update get-poetry.py script

        print('Installing version: ' + colorize('info', version))

        try:

            return self.install(version)

        except subprocess.CalledProcessError as e:

            print(colorize('error', 'An error has occured: {}'.format(str(e))))

            print(e.output)

            return e.returncode

    def install(self, version):

        # Most of the work will be delegated to pip