code: def expose(dists):
    
    from pex.common import safe_delete
  
    for path in VendorImporter.expose(dists, root=isolated()):
      safe_delete(os.path.join(path, '__init__.py'))
      yield path
docs: Exposes vendored code in isolated chroots.
  
    Any vendored distributions listed in ``dists`` will be unpacked to individual chroots for addition
    to the ``sys.path``; ie: ``expose(['setuptools', 'wheel'])`` will unpack these vendored
    distributions and yield the two chroot paths they were unpacked to.
  
    :param dists: A list of vendored distribution names to expose.
    :type dists: list of str
    :raise: :class:`ValueError` if any distributions to expose cannot be found.
    :returns: An iterator of exposed vendored distribution chroot paths.