使用Beautifulsoup4从HTML剥离Doctype？

Question

我是Python和BeautifulSoup的新手，所以请多多包涵...

我正在尝试弄清楚如何使用Beautifulsoup4从HTML文件中删除Doctype，但似乎无法弄清楚如何实现这一点。

def saveToText(self):
    filename = os.path.join(self.parent.ReportPath, str(self.parent.CharName.text()) + "_report.txt")
    filename, filters = QFileDialog.getSaveFileName(self, "Save Report", filename, "Text (*.txt);;All Files (*.*)")

    if filename is not None and str(filename) != '':

        try:
            if re.compile('\.txt$').search(str(filename)) is None:
                filename = str(filename)
                filename += '.txt'

            soup = BeautifulSoup(self.reportHtml, "lxml")

            try:  # THROWS AttributeError IF NOT FOUND ..
                soup.find('font').extract()
            except AttributeError:
                pass

            try:  # THROWS AttributeError IF NOT FOUND ..
                soup.find('head').extract()

            except AttributeError:
                pass

            soup.html.unwrap()
            soup.body.unwrap()

            for b in soup.find_all('b'):
                b.unwrap()

            for table in soup.find_all('table'):
                table.unwrap()

            for td in soup.find_all('td'):
                td.unwrap()

            for br in soup.find_all('br'):
                br.replace_with('\n')

            for center in soup.find_all('center'):
                center.insert_after('\n')

            for dl in soup.find_all('dl'):
                dl.insert_after('\n')

            for dt in soup.find_all('dt'):
                dt.insert_after('\n')

            for hr in soup.find_all('hr'):
                hr.replace_with(('-' * 80) + '\n')

            for tr in soup.find_all('tr'):
                tr.insert_before('  ')
                tr.insert_after('\n')

            print(soup)

        except IOError:
            QMessageBox.critical(None, 'Error!', 'Error writing to file: ' + filename, 'OK')

我尝试使用：

from bs4 import Doctype

if isinstance(e, Doctype):
    e.extract()

但这抱怨'e'是一个未解决的引用。 我已经搜索了文档和Google，但是没有找到任何有效的方法。

附带说明一下，有没有办法减少此代码？

Answer 1

这似乎可以完美地解决问题。

from bs4 import BeautifulSoup, Doctype

for item in soup.contents:
    if isinstance(item, Doctype):
        item.extract()