expatbuilder.py 文件源码

def _parse_ns_name(builder, name):
    assert ' ' in name
    parts = name.split(' ')
    intern = builder._intern_setdefault
    if len(parts) == 3:
        uri, localname, prefix = parts
        prefix = intern(prefix, prefix)
        qname = "%s:%s" % (prefix, localname)
        qname = intern(qname, qname)
        localname = intern(localname, localname)
    elif len(parts) == 2:
        uri, localname = parts
        prefix = EMPTY_PREFIX
        qname = localname = intern(localname, localname)
    else:
        raise ValueError("Unsupported syntax: spaces in URIs not supported: %r" % name)
    return intern(uri, uri), localname, prefix, qname