index.py 文件源码

def _find_url_name(self, index_url, url_name, req):
        """Finds the true URL name of a package, when the given name isn't quite correct.
        This is usually used to implement case-insensitivity."""
        if not index_url.url.endswith('/'):
            # Vaguely part of the PyPI API... weird but true.
            ## FIXME: bad to modify this?
            index_url.url += '/'
        page = self._get_page(index_url, req)
        if page is None:
            logger.fatal('Cannot fetch index base URL %s' % index_url)
            return
        norm_name = normalize_name(req.url_name)
        for link in page.links:
            base = posixpath.basename(link.path.rstrip('/'))
            if norm_name == normalize_name(base):
                logger.notify('Real name of requirement %s is %s' % (url_name, base))
                return base
        return None