[
'How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?',
'How to call an external command?',
'What are metaclasses in Python?',
'Does Python have a ternary conditional operator?',
'How do you remove duplicates from a list whilst preserving order?',
'Convert bytes to a string',
'How to get line count of a large file cheaply in Python?',
"Does Python have a string 'contains' substring method?",
'Why is “1000000000000000 in range(1000000000000001)” so fast in Python 3?'
]
两个页面的抓取结果为: 3 p- F, s* U3 w$ V U. X 1 o; i4 r1 M3 |# i, R抓取确切结果6 x1 e: W6 g% K1 F9 k4 O
当你只想抓取某个确切的结果,可以使用get_result_exact方法,即从wanted_list中以完全相同的顺序检索数据:4 s6 g& h. g8 s
比如抓取页面中排第2的相关文章标题,执行结果: 4 _1 ~2 Z; o% q4 j* [/ p5 v3 G
3 r. _1 P+ ]) i. Q- P
自定义请求模块参数) j* s. T" V; c# R3 p. B
你还可以传递任何自定义请求模块参数。例如,你可能想使用代理或自定义头: & K. A) a/ u6 ]* k' q; ~- s& U# y6 H