在Python中删除嵌套的bbcode引号？

Question

我尝试搜索此内容，但只找到了PHP答案。我在Google App Engine上使用Python并尝试删除嵌套引号。

例如：

[quote user2]
[quote user1]Hello[/quote]
World
[/quote]

我想运行一些东西来获得最外层的引用。

[quote user2]World[/quote]

Answer 1

不确定您是否只需要引号，或者删除了嵌套引号的整个输入。这个pyparsing样本同时做到了：

stuff = """
Other stuff
[quote user2] 
[quote user1]Hello[/quote] 
World 
[/quote] 
Other stuff after the stuff
"""

from pyparsing import (Word, printables, originalTextFor, Literal, OneOrMore, 
    ZeroOrMore, Forward, Suppress)

# prototype username
username = Word(printables, excludeChars=']')

# BBCODE quote tags
openQuote = originalTextFor(Literal("[") + "quote" + username + "]")
closeQuote = Literal("[/quote]")

# use negative lookahead to not include BBCODE quote tags in tbe body of the quote
contentWord = ~(openQuote | closeQuote) + (Word(printables,excludeChars='[') | '[')
content = originalTextFor(OneOrMore(contentWord))

# define recursive definition of quote, suppressing any nested quotes
quotes = Forward()
quotes << ( openQuote + ZeroOrMore( Suppress(quotes) | content ) + closeQuote )

# put separate tokens back together
quotes.setParseAction(lambda t : '\n'.join(t))

# quote extractor
for q in quotes.searchString(stuff):
    print q[0]

# nested quote stripper
print quotes.transformString(stuff)

打印：

[quote user2]
World
[/quote]

Other stuff
[quote user2]
World
[/quote] 
Other stuff after the stuff

Answer 2

您应该在Python中找到并使用真正的BBCode解析器。谷歌搜索带来了一些点击 - 例如this one和this one。