html%3c%3e表示lt,在Python中转义HTML最简单的方法是什么？

不是最简单的方法，但仍然简单。与cgi.escape模块的主要区别 - 如果您的文本中已经有&，它仍然可以正常工作。正如你从评论中看到的那样：

cgi.escape版本

def escape(s, quote=None):

'''Replace special characters "&", "" to HTML-safe sequences.

If the optional flag quote is true, the quotation mark character (")

is also translated.'''

s = s.replace("&", "&") # Must be done first!

s = s.replace("

s = s.replace(">", ">")

if quote:

s = s.replace('"', """)

return s正则表达式版本

QUOTE_PATTERN = r"""([&<>"'])(?!(amp|lt|gt|quot|#39);)"""

def escape(word):

"""

Replaces special characters <>&"' to HTML-safe sequences.

With attention to already escaped characters.

"""

replace_with = {

'

'>': '<',

'&': '&',

'"': '"', # should be escaped in attributes

"'": ''' # should be escaped in attributes

}

quote_pattern = re.compile(QUOTE_PATTERN)

return re.sub(quote_pattern, lambda x: replace_with[x.group(0)], word)