正则表达式如何匹配多个相同标签的内容

Question

<Keyword MajorTopicYN="N">chromatin remodeling complex</Keyword>
<Keyword MajorTopicYN="N">ciliopathy</Keyword>
<Keyword MajorTopicYN="N">dynein arm assembly factor</Keyword>

我想要匹配keyword标签之间的全部内容
现在我的写法如下，不过只匹配到第一个keyword标签的内容，请问该如何修改？

if(/\<Keyword .*?\>(.*?)\<\/Keyword\>/g.test(str)){
    console.log(RegExp.$1);
}

Answer 1

这两种正则方式都可以尝试一下。
或者还可以使用DOM操作的方式，query出来所有的Keyword，然后取innerHTML

DOM操作示例：

let result = (() => {
  let str = `
    <Keyword MajorTopicYN="N">chromatin remodeling complex</Keyword>
    <Keyword MajorTopicYN="N">ciliopathy</Keyword>
    <Keyword MajorTopicYN="N">dynein arm assembly factor</Keyword>
  `
  let parse = new DOMParser()

  let dom = parse.parseFromString(`<div>${str}</div>`, 'text/xml')

  let keywordList = dom.querySelectorAll('Keyword')

  return (keywordList && keywordList.length) ? Array.from(keywordList).map(dom => dom.innerHTML) : null
})()

console.log(result)

正则示例：

let result1 = (() => {
  let str = `
    <Keyword MajorTopicYN="N">chromatin remodeling complex</Keyword>
    <Keyword MajorTopicYN="N">ciliopathy</Keyword>
    <Keyword MajorTopicYN="N">dynein arm assembly factor</Keyword>
  `
  let reg = /<Keyword[^>]*>(.*)<\/Keyword>/gmi
  let tagReg = /^<Keyword[^>]*>(.*)<\/Keyword>$/
  let result = str.match(reg)

  return result.length ? result.map(tag => tag.match(tagReg)[1]) : null 
})()

let result2 = (() => {
  let str = `
    <Keyword MajorTopicYN="N">chromatin remodeling complex</Keyword>
    <Keyword MajorTopicYN="N">ciliopathy</Keyword>
    <Keyword MajorTopicYN="N">dynein arm assembly factor</Keyword>
  `
  let reg = /<Keyword[^>]*>(.*)<\/Keyword>/gmi

  let result = []
  str.replace(reg, (_, $1) => result.push($1))

  return result
})()

console.log(result1, result2)

Answer 2

from bs4 import BeautifulSoup
html = '''<Keyword MajorTopicYN="N">chromatin remodeling complex</Keyword>
<Keyword MajorTopicYN="N">ciliopathy</Keyword>
<Keyword MajorTopicYN="N">dynein arm assembly factor</Keyword>'''

soup = BeautifulSoup(html,'html.parser')
ss = soup.find_all('keyword')
for s in ss:
    print s.get_text()