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Python????????

1. Python2?Python3???

Python2?Python3??????????????????????

• ?????Python3???print?????print()???Python2???print???
• ????Python3?urllib2????urllib???????urllib.request?
• ?????Python3???????utf-8??Python2???gbk???

2. GET?POST??

• GET??????????????URL?????????????
• POST????????????????????????data???
• ????????headers???????HTTP?????User-Agent?

3. User-Agent???

???????????????????????User-Agent?Python-urllib/x.y?

4. URL?????

• ?????urllib.parse.urlencode()??????URL?????
• ?????parse.quote()?parse.unquote()????URL??????

5. HTTPS???????

Python3????SSL??????????????CA?????

6. ???Handler?Opener

• Handler????????????Cookie?
• Opener???build_opener()???????????
• ????Opener???install_opener()????Opener??????

7. Cookies??

• ??Cookie???CookieJar?HTTPCookieProcessor??????Cookie?
• ???????Cookie?????????????

8. ???????

• ???????re.compile()??????????
• ?????match()??????????search()????????
• ????????groups()???????sub()???????

9. ??DEMO??

Demo1?????

• ???????urllib.request.Request??HTTP???
• ??????????????????
• ???????a+???????????

Demo2?????????

• ????????requests???????????
• XPath?????????????????
• ???????????????????

Demo3???????

• URL???????URL???
• XPath?????lxml??????????
• ??????????????JSON???

10. CSRF??

• Token?????csrf_token???????
• ???????????????????????????

?????????DEMO???????Python?????????????????????

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