Python爬虫中BeautifulSoup对象创建方法有哪些？

　　首先必须要导入 bs4 库

　　from bs4 import BeautifulSoup

　　我们创建一个字符串，后面的例子我们便会用它来演示

　　html = """

　　The Dormouse's story

　　Once upon a time there were three little sisters; and their names were

　　,

　　Lacie and

　　Tillie;

　　and they lived at the bottom of a well.

　　...

　　"""

　　创建 beautifulsoup 对象

　　soup = BeautifulSoup(html)

　　另外，我们还可以用本地 HTML 文件来创建对象，例如

　　soup = BeautifulSoup(open('index.html'))

　　上面这句代码便是将本地 index.html 文件打开，用它来创建 soup 对象 下面我们来打印一下 soup 对象的内容，格式化输出

　　print soup.prettify()

　　输出结果：

　　The Dormouse's story

　　Once upon a time there were three little sisters; and their names were

　　,

　　Lacie

　　and

　　Tillie

　　;

　　and they lived at the bottom of a well.

　　...