python - lxml modify tags prevent -

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how prevent lxml modify tags 

from lxml import etree lxml.html.soupparser import fromstring  html = '<iframe width="560" height="315" src="" frameborder="0" allowfullscreen></iframe>' root = fromstring(html) print etree.tostring(root,encoding='utf-8')

it prints short version of tag

'<iframe width="560" height="315" src="" frameborder="0" allowfullscreen/>'

how prevent this? needed output

'<iframe width="560" height="315" src="" frameborder="0" allowfullscreen></iframe>'

?

use tostring() method="html":

print etree.tostring(root.find('iframe'), encoding='utf-8', method="html")

demo:

>>> lxml import etree >>> lxml.html.soupparser import fromstring >>> >>> html = '<iframe width="560" height="315" src="" frameborder="0" allowfullscreen></iframe>' >>> root = fromstring(html) >>> print etree.tostring(root.find('iframe'), encoding='utf-8', method="html") <iframe allowfullscreen="allowfullscreen" frameborder="0" height="315" src="" width="560"></iframe>

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