django:

from django.utils.html import escape
print escape('
Q & A
')

python标准库，3.x为:html.entities,python2.x里对应的是htmlentitydefs模块
3.x:

>>> import html.entities
>>> html.entities.codepoint2name[ord("&")]
'amp'
>>> html.entities.codepoint2name[ord('"')]
'quot'

2.x

import htmlentitydefs
print htmlentitydefs.codepoint2name[ord('&')]
amp

反向解码，即类似php的htmlspecialchars_decode()函数

print chr(htmlentitydefs.name2codepoint['amp'])
&

参考: Is there a Python equivalent to the PHP function htmlspecialchars()? – Stack Overflow