网络请求库

python爬虫的网络请求库

-urllib
	-request
		-urlopen()
		-urlretrieve(fullurl,filename)
		-Request(url, data=None, headers)
		-build_opener(*handlers)
		-HTTPHandler
		-HTTPCookieProcessor(http.cookiejar.CookieJar())
		-ProxyHandler(proxies={})
	-parse
		-quote()
		-urlencode()
	-http.client.HTTPResponse
		-code
		-getheaders()
		-getheader(name, default)
		read() 读取的响应字节数据
-requests (第三方模块)
	-request(method, url, params, data, json, files, headers, cookies, proxies, auth)
		-get(url, params, **kwargs)
		-post(url, data, json, **kwargs)
		-put(url, data, json, **kwargs)
		-delete(url, data, json, **kwargs)
	-Response
		-status_code
		-encoding
		-headers
		-content 字节数据
		-text 文本数据
		-json() json文本反序列化为Python的dict/list的对象