code: def install(self, version):
          
          c = self._pyenv(
              'install', '-s', str(version),
              timeout=PIPENV_INSTALL_TIMEOUT,
          )
          return c
docs: Install the given version with pyenv.
  
          The version must be a ``Version`` instance representing a version
          found in pyenv.
  
          A ValueError is raised if the given version does not have a match in
          pyenv. A PyenvError is raised if the pyenv command fails.