from scrapy.selector import Selector htmlText=''' ...

第1题

from scrapy.selector import Selector htmlText=''' <html> <body> <bookstore> <title>books</title> <book> <title>Novel</title> <title lang="eng">Harry Potter</title> <price>29.99</price> </book> <book> <title>TextBook</title> <title lang="eng">Learning XML</title> <price>39.95</price> </book> ''' selector=Selector(text=htmlText) _____________________________________ for e in s: print(e) 程序结果： <selector xpath="//book/title" data="<title>Novel</title>"> <selector xpath="//book/title" data="<title lang=" eng">Harry Potter</selector></selector></bookstore></body></html></title>"> <selector xpath="//book/title" data="<title>TextBook</title>"> <selector xpath="//book/title" data="<title lang=" eng">Learning XML</selector></selector></book></bookstore></body></html></title>">

A、s=selector.xpath("/book").xpath("./title")

B、s=selector.xpath("//book").xpath("./title")

C、s=selector.xpath("//book").xpath("/title")

D、s=selector.xpath("/book").xpath("/title")

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第2题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <bookstore> <book id="b1"> <title lang="english">Harry Potter</title> <price>29.99</price> </book> <book id="b2"> <title lang="chinese">学习XML</title> <price>39.95</price> </book> </bookstore> ''' selector=Selector(text=htmlText) ____________________________________ print(s.extract_first()) ____________________________________ print(s.extract_first()) 程序结果： <title lang="english">Harry Potter</title> <title lang="chinese">学习XML</title>

A、s=selector.xpath("//book[position=1]/title"); s=selector.xpath("//book[position=2]/title")

B、s=selector.xpath("//book[position()=2]/title"); s=selector.xpath("//book[position()=1]/title")

C、s=selector.xpath("//book[position=2]/title"); s=selector.xpath("//book[position=1]/title")

D、s=selector.xpath("//book[position()=1]/title"); s=selector.xpath("//book[position()=2]/title")

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第3题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <bookstore> <book id="b1"> <title lang="english">Harry Potter</title> <price> 29.99 </price> </book> <book id="b2"> <title lang="chinese">学习XML</title> <price> 39.95 </price> </book> </bookstore> ''' selector=Selector(text=htmlText) _____________________________________ print(s) print(s.extract()) for e in s: print(e.extract()) 程序结果： [ <selector xpath="//book/title/text()" data="Harry Potter"> , <selector xpath="//book/title/text()" data="学习XML"> ] ['Harry Potter', '学习XML'] Harry Potter 学习XML

A、s=selector.xpath("/book/title/text()")

B、s=selector.xpath("/book/title/text")

C、s=selector.xpath("//book/title/text()")

D、s=selector.xpath("book/title/text()")

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第4题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <bookstore> <book id="b1"> <title lang="english">HarryPotter</title> <price> 29.99 </price> </book> </bookstore> ''' selector=Selector(text=htmlText) _________________________ print(s) print(s.extract()) for e in s: print(e.extract()) 程序结果： [ <selector xpath="//book/title/text()" data="arry "> , <selector xpath="//book/title/text()" data="otter"> ] ['arry ', 'otter'] arry otter

A、s=selector.xpath("//book/title/text()")

B、s=selector.xpath("/book/title/text()")

C、s=selector.xpath("//book/title/text")

D、s=selector.xpath("/book/title/text")

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第5题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <bookstore> <book id="b1"> <title lang="english">Harry Potter</title> <price> 29.99 </price> </book> <book id="b2"> <title lang="chinese">学习XML</title> <price> 39.95 </price> </book> </bookstore> ''' selector=Selector(text=htmlText) ____________________________________________________ print(s.extract_first()) s=selector.xpath("//book[@id='b1']/title") print(s.extract_first()) 程序结果：学习XML <title lang="english">Harry Potter</title>

A、s=selector.xpath("//book/title[@lang='chinese']/text")

B、s=selector.xpath("//book/title[lang='chinese']/text")

C、s=selector.xpath("//book/title[@lang='chinese']/text()")

D、s=selector.xpath("//book/title[@lang='chinese']/text")

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第6题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <html> <body> <bookstore> <book> <title lang="english">Harry Potter</title> <price>29.99</price> </book> <book id="b2"> <title lang="chinese">学习XML</title> <price>39.95</price> </book> </bookstore></body></html></price></title></book></book></book></book></book></book></bookstore> ''' selector=Selector(text=htmlText) ______________________________________________ print(s.extract()) 程序结果： ['<book id="b2">\n <title lang="chinese">学习XML</title>\n <price>39.95</price>\n</book>']

A、s=selector.xpath("//title[@lang='chinese']/parent:*")

B、s=selector.xpath("//title[lang='chinese']/parent::*")

C、s=selector.xpath("//title[@lang='chinese']/parent::*")

D、s=selector.xpath("//title[lang='chinese']/parent:*")

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第7题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <bookstore> <book> <title lang="eng">Harry Potter</title> <price> 29.99 </price> </book> <book> <title lang="eng">Learning XML</title> <price> 39.95 </price> </book> </bookstore> ''' selector=Selector(text=htmlText) print(type(selector)); print(selector) _______________ print(type(s)) print(s) 查找所有的 <title>

A、s=selector.xpath("title")

B、s=selector.xpath("//title")

C、s=selector.xpath("/title")

D、s=selector.xpath("///title")

参考答案：<span style="color:rgb(255, 0, 0)">B</span>

4、from scrapy.selector import Selector htmlText=''' <html> <body> <bookstore> <title>books</title> <book> <title>Novel</title> <title lang="eng">Harry Potter</title> <price> 29.99 </price> </book> <book> <title>TextBook</title> <title lang="eng">Learning XML</title> <price> 39.95 </price> </book> ''' selector=Selector(text=htmlText) _____________________________________ for e in s: print(e) 程序结果： <selector xpath="//book/title" data="<title>Novel</title>"> <selector xpath="//book/title" data="<title lang=" eng">Harry Potter"> <selector xpath="//book/title" data="<title>TextBook</title>"> <selector xpath="//book/title" data="<title lang=" eng">Learning XML">

A、s=selector.xpath("/book").xpath("./title")

B、s=selector.xpath("//book").xpath("./title")

C、s=selector.xpath("//book").xpath("/title")

D、s=selector.xpath("/book").xpath("/title")

点击查看答案

第8题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <bookstore> <book> <title lang="english">Harry Potter</title> <price> 29.99 </price> </book> <book id="b2"> <title lang="chinese">学习XML</title> <price> 39.95 </price> </book> </bookstore> ''' selector=Selector(text=htmlText) ______________________________________________ print(s.extract()) 程序结果： [' <book id="b2"> \n <title lang="chinese">学习XML</title>\n <price> 39.95 </price>\n </book>']

A、s=selector.xpath("//title[@lang='chinese']/parent:*")

B、s=selector.xpath("//title[lang='chinese']/parent::*")

C、s=selector.xpath("//title[@lang='chinese']/parent::*")

D、s=selector.xpath("//title[lang='chinese']/parent:*")

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第9题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <bookstore> <book id="b1"> <title lang="english">HarryPotter</title> <price>29.99</price> </book> </bookstore> ''' selector=Selector(text=htmlText) _________________________ print(s) print(s.extract()) for e in s: print(e.extract()) 程序结果： [<selector xpath="//book/title/text()" data="arry ">, <selector xpath="//book/title/text()" data="otter">] ['arry ', 'otter'] arry otter

A、s=selector.xpath("//book/title/text()")

B、s=selector.xpath("/book/title/text()")

C、s=selector.xpath("//book/title/text")

D、s=selector.xpath("/book/title/text")

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第10题

from scrapy.selector import Selector htmlText=''' ...

from scrapy.selector import Selector htmlText=''' <bookstore> <book id="b1"> <title lang="english">Harry Potter</title> <price> 29.99 </price> </book> <book id="b2"> <title lang="chinese">学习XML</title> <price> 39.95 </price> </book> </bookstore> ''' selector=Selector(text=htmlText) s=selector.xpath("//book/price") print(type(s),s) ____________________________________ print(type(s),s) s=selector.xpath("//book/price").extract_first() print(type(s),s) 程序结果： <class 'scrapy.selector.unified.selectorlist'> [ <selector xpath="//book/price" data="<price>29.99</price>"> , <selector xpath="//book/price" data="<price>39.95</price>"> ] <class 'list'> [' <price> 29.99 </price>', ' <price> 39.95 </price>'] <class 'str'> <price> 29.99 </price>

A、s=selector.xpath("/book/price").extract()

B、s=selector.xpath("/book//price").extract()

C、s=selector.xpath("//book//price").extract()

D、s=selector.xpath("//book/price").extract()

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