导入
form bs4 import BeautifulSoup
构造
soup = BeautifulSoup(html, 'lxml')
soup = BeautifulSoup(open('page.html', encoding='utf8')
搜索树
soup.find_all()
关键字
class_=''
id = 'id'
id = True
属性
多条件 attrs={'key':'value',....}
文本string
soup.find_all('p',string=re.compile(r'sit')
soup.find()
soup.select('css选择器')
soup.select('p.red')
