Beautiful Soup 简明教程
Beautiful Soup - Copying Objects
要创建任何标记或 NavigableString 的副本，请使用 Python 标准库中 copy 模块中的 copy() 函数。
To create a copy of any tag or NavigableString, use copy() function from the copy module from Python’s standard library.
Example
from bs4 import BeautifulSoup
import copy
markup = "<p>Learn <b>Python, Java</b>, <i>advanced Python and advanced Java</i>! from Tutorialspoint</p>"
soup = BeautifulSoup(markup, "html.parser")
i1 = soup.find('i')
icopy = copy.copy(i1)
print (icopy)Output
<i>advanced Python and advanced Java</i>虽然两个副本（原副本和已复制副本）包含相同的标记，但这两个副本并不表示相同的对象。
Although the two copies (original and copied one) contain the same markup however, the two do not represent the same object.
print (i1 == icopy)
print (i1 is icopy)