python - 正则表达式提取段落

Question

我正在尝试用 Python 编写正则表达式来提取段落的一部分。

在下面的段落中，我想要提取的部分以粗体显示。

Proposal will boost bailout fund, inject cash into banks and cut Greek debt says reports.

我的正则表达式和输出如下，

>>> text = 'Proposal will boost bailout fund, inject cash into banks and cut Greek debt says reports.'
>>> pattern = re.compile(r'(boost bailout)+?([\s\S]*?)(debt)+?')
>>> print re.findall(pattern, text)

[('boost bailout', ' fund, inject cash into banks and cut Greek ', 'debt')]

虽然它确实提取了正确的部分，但是提取被分为元组中的 3 个部分而不是像下面这样的单行，是否正确？

[('boost bailout fund, inject cash into banks and cut Greek debt')]

Answer 1

来自文档:

If one or more groups are present in the pattern, return a list of groups; this will be a list of tuples if the pattern has more than one group. Empty matches are included in the result unless they touch the beginning of another match.

-- http://docs.python.org/library/re.html

如果您想要一场比赛，请执行以下操作:

#!/usr/bin/env python
import re
text = 'Proposal will boost bailout fund, inject cash into banks and cut Greek debt says reports.'
pattern = re.compile(r'boost bailout[\s\S]*?debt')
print re.findall(pattern, text)