import?urllib.request

class?HtmlDownloader（object）:
????
????def?download（selfurl）:
????????if?url?is?None:
????????????return?None
????????request1?=?urllib.request.Request（url）
????????response?=?urllib.request.urlopen（request1）

????????if?response.getcode（）!=200:
????????????return?None
????????
????????return?response.read（）

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????文件????????2153??2017-07-20?14:42??Python_百科爬蟲.pyproj
?????文件?????????227??2017-07-20?14:42??Python_百科爬蟲.pyproj.user
?????目錄???????????0??2017-08-10?18:12??__pycache__\
?????文件?????????603??2017-07-20?13:33??__pycache__\html_downloader.cpython-36.pyc
?????文件????????1081??2017-07-20?13:40??__pycache__\html_outputer.cpython-36.pyc
?????文件????????1320??2017-07-20?13:38??__pycache__\html_parser.cpython-36.pyc
?????文件????????1170??2017-07-20?12:06??__pycache__\url_manager.cpython-36.pyc
?????文件?????????479??2017-07-20?14:42??__pycache__\wpf.cpython-36.pyc
?????文件?????????350??2017-07-20?13:33??html_downloader.py
?????文件?????????774??2017-07-20?13:40??html_outputer.py
?????文件????????1164??2017-07-20?13:37??html_parser.py
?????文件???????26346??2017-08-17?11:42??output.html
?????文件????????1490??2017-08-17?11:46??spider_main.py
?????文件?????????666??2017-07-20?12:06??url_manager.py
?????文件?????????141??2017-07-20?14:41??wpf.py
?????文件?????????232??2017-07-20?14:40??wpf.xaml