题目内容
（请给出正确答案）
A
X
B
＜span＞
C
＜/span＞
D
" soup=BeautifulSoup(doc,"lxml") print(soup.prettify()) tags=soup.select("div ~ p") for tag in tags: print(tag) print() tags=soup.select("div + p") for tag in tags: print(tag) 结果是
A、
B
;
D
B、
B
;
C
C、
C
;
D
D、
D
;
C
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更多“from bs4 import BeautifulSoup doc="demo”相关的问题
A.B ; D
B.B ; C
C.C ; D
D.D ; C
A
＜span＞
B
＜/span＞
C
" soup=BeautifulSoup(doc,"lxml") tags=soup.select("div ＞ p") for tag in tags: print(tag) 程序结果：
A
one
two
''' soup=BeautifulSoup(doc,"lxml") s=soup.prettify() print(s) 程序结果如下： html＞ ＜title＞ 有缺失元素的HTML文档 ＜/title＞
onetwo
对吗？
The Dormouse's story
Once upon a time there were three little sisters; and their names were Elsie, Lacie and Tillie; and they lived at the bottom of a well.
...
''' soup=BeautifulSoup(doc,"lxml") tag=soup.find("a") print(tag) 程序结果找到第一个 元素： Elsie 对吗？
from bs4 import BeautifulSoup import urllib.request class Stack: def __init__(self): self.st=[] def pop(self): return self.st.pop() def push(self,obj): self.st.append(obj) def empty(self): return len(self.st)==0 def spider(url): stack=Stack() stack.push(url) while not stack.empty(): url=stack.pop() try: data=urllib.request.urlopen(url) data=data.read() data=data.decode() soup=BeautifulSoup(data,"lxml") print(soup.find("h3").text) links=soup.select("a") for i in _______________________________: href=links[i]["href"] url=start_url+"/"+href stack.push(url) except Exception as err: print(err) start_url="http://127.0.0.1:5000" spider(start_url) print("The End")
A、range(len(links)-1,-1,-1)
B、range(len(links),-1,-1)
C、range(len(links)-1,0,-1)
D、range(len(links),0,-1)
The Dormouse's story
Once upon a time there were three little sisters; and their names were Elsie, Lacie and Tillie; and they lived at the bottom of a well.
...
''' soup=BeautifulSoup(doc,"lxml") tags=soup.find_all("a") for tag in tags: print(tag) 程序结果找到1个 元素： Elsie 对吗？
查找文档中所有超级链接包含的文本值 from bs4 import BeautifulSoup doc=''' ＜title＞The Dormouse's story＜/title＞
The Dormouse's story
Once upon a time there were three little sisters; and their names were Elsie, Lacie and Tillie; and they lived at the bottom of a well.
...
''' soup=BeautifulSoup(doc,"lxml") _____________________________ for tag in tags: ________________________ 缺失的语句是：
A、tags=soup.find_all("a"); print(tag.text)
B、tags=soup.find("a"); print(tag.text)
C、tags=soup.find_all("a"); print(tag["text"])
D、tags=soup.find_all("a"); print(tag.text)
我们查找文档中的href="http://example.com/lacie"的节点元素 from bs4 import BeautifulSoup doc=’’’ ＜title＞The Dormouse’s story＜/title＞ Elsie Lacie Tillie ’’’ def myFilter(tag): print(tag.name) __________________________________________ soup=BeautifulSoup(doc,"lxml") tag=soup.find_all(myFilter) print(tag) 缺失的语句是：
A、return (tag.name=="a" and tag["href"]=="http://example.com/lacie")
B、return (tag.name=="a" and tag.has_attr("href") and tag["href"]=="http://example.com/lacie")
C、return (tag.name=="a" and tag.has_attr("href") and tag.href=="http://example.com/lacie")
D、return (tag.name=="a" and tag.href=="http://example.com/lacie")
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