scrapy中的ruquest

1. scrapy.Request 对象和 requests.get()
 1 class Request(object_ref):
 2 
 3     def __init__(self, url, callback=None, method='GET', headers=None, body=None,
 4                  cookies=None, meta=None, encoding='utf-8', priority=0,
 5                  dont_filter=False, errback=None, flags=None):
 6 
 7         self._encoding = encoding  # this one has to be set first
 8         self.method = str(method).upper()
 9         self._set_url(url)
10         self._set_body(body)
11         assert isinstance(priority, int), "Request priority not an integer: %r" % priority
12         self.priority = priority
13 
14         assert callback or not errback, "Cannot use errback without a callback"
15         self.callback = callback
16         self.errback = errback
17 
18         self.cookies = cookies or {}
19         self.headers = Headers(headers or {}, encoding=encoding)
20         self.dont_filter = dont_filter
21 
22         self._meta = dict(meta) if meta else None
23         self.flags = [] if flags is None else list(flags)