def _build_package_finder(self, options, index_urls, session):
return PackageFinder(<EOL>find_links=options.find_links,<EOL>index_urls=index_urls,<EOL>allow_all_prereleases=options.pre,<EOL>trusted_hosts=options.trusted_hosts,<EOL>session=session,<EOL>)<EOL>
Create a package finder appropriate to this list command.