create http post by using Request

AccessCSDN.py

#build request for login url
	#post data
	postdata = {
	    'u':username,
	    'p':password,
	    'remember':'1',
	    't':'log',
	    'f':urllib.parse.quote(moduleUrl),
	    }

	postdata = urllib.parse.urlencode(postdata).encode('utf-8')
	print(postdata)

	req = urllib.request.Request(
		url = csdnLoginUrl,
		data = postdata)

	req.add_header('Accept', 'text/html, application/xhtml+xml, */*');
	req.add_header('Accept-Language', 'en-US')
	req.add_header('Accept-Encoding', 'gzip, deflate')
	req.add_header('Connection', 'Keep-Alive');
	req.add_header('Referer', csdnAccessModuleUrl)
	req.add_header('User-Agent', 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)');

	#open login url
	r = urllib.request.urlopen(req)