[
'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: . E: m. [& n+ ~' I- b. ~% h8 g7 P 9 o7 |3 P: s# m& Z抓取确切结果 ( Y \$ E K1 d, V/ Q- ^+ B) _ 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:5 q) ?& p' @. T; I# R
比如抓取页面中排第2的相关文章标题,执行结果:4 e) H" I3 z! W* j- D9 Z3 C
( m. t) @( s1 | M8 M) U. n
自定义请求模块参数- c8 r8 W( D. e" Q, r+ f
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:9 w1 w, c- _5 F; V! p" P }