is not None: self.name = name elif not getattr(self, 'name', None): raise ValueError...Request(object_ref): def __init__(self, url, callback=None, method='GET', headers=None, body=None..., cookies=None, meta=None, encoding='utf-8', priority=0, dont_filter=...False, errback=None, flags=None): self...._meta = dict(meta) if meta else None self.flags = [] if flags is None else list(flags)
4、Scrapy