Question

我需要在html文档的DOCTYPE标记中添加一个ATTLIST声明。

在阅读文档并进行谷歌搜索之后，这就是我想出的：

from bs4 import BeautifulSoup, Doctype

# minimal html document
doc = """<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<html/>"""

soup = BeautifulSoup(doc, features='html.parser')

# the modified doctype tag
doctype = """<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
[<!ATTLIST span bodyref CDATA #IMPLIED>] >"""

dt = BeautifulSoup(doctype, features='html.parser')

for item in soup.contents:
    if isinstance(item, Doctype):
        item.replace_with(dt)
        break

print(soup.prettify(formatter=None))

这会产生所需的结果，但是感觉有点“ hacky”。我只想将ATTLIST部分插入标签，而不是像我在这里所做的那样替换整个内容。有谁知道该怎么做？

Answer 1

一个小改进是构建一个Doctype对象并替换为该对象，例如：

from bs4 import BeautifulSoup, Doctype

# minimal html document
doc = """<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<html/>"""

# the modified doctype tag
doctype = """html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
[<!ATTLIST span bodyref CDATA #IMPLIED>]"""

soup = BeautifulSoup(doc, features='html.parser')

for item in soup.contents:
    if isinstance(item, Doctype):
        item.replace_with(Doctype(doctype))
        break

print(soup.prettify(formatter=None))

给予：

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
[<!ATTLIST span bodyref CDATA #IMPLIED>]>
<html>
</html>

使用BeautifulSoup编辑DOCTYPE标记

1 个答案: