Question

例如，我有3个句子，如下图所示，中间的一个句子包含引号(Warren and Pereira, 1982)。引用总是以这种格式括起来：（~tring~逗号（，）~space~ number~）

他住在Nidarvoll，今晚我必须在6点钟到达奥斯陆的火车。该系统名为BusTUC，建立在经典系统CHAT-80（Warren和Pereira，1982）之上。 CHAT-80是最先进的自然语言系统令人印象深刻的是它的优点。

我使用正则表达式只提取中间句子，但它会打印所有3个句子。结果应该是这样的：

该系统名为BusTUC，建立在经典的CHAT-80系统之上（Warren和Pereira，1982）。

Answer 1

设置......代表感兴趣案例的2个句子：

text = "He lives in Nidarvoll and tonight i must reach a train to Oslo at 6 oclock. The system, called BusTUC is built upon the classical system CHAT-80 (Warren and Pereira, 1982). CHAT-80 was a state of the art natural language system that was impressive on its own merits."

t2 = "He lives in Nidarvoll and tonight i must reach a train to Oslo at 6 oclock. The system, called BusTUC is built upon the classical system CHAT-80 (Warren and Pereira, 1982) fgbhdr was a state of the art natural. CHAT-80 was a state of the art natural language system that was impressive on its own merits."

首先，在引文位于句子末尾的情况下进行匹配：

p1 = "\. (.*\([A-za-z]+ .* [0-9]+\)\.+?)"

当引文不在句末时匹配：

p2 = "\. (.*\([A-za-z]+ .* [0-9]+\)[^\.]+\.+?)"

将两种情况与“|”结合正则表达式运算符：

p_main = re.compile("\. (.*\([A-za-z]+ .* [0-9]+\)\.+?)"
                "|\. (.*\([A-za-z]+ .* [0-9]+\)[^\.]+\.+?)")

运行：

>>> print(re.findall(p_main, text))
[('The system, called BusTUC is built upon the classical system CHAT-80 (Warren and Pereira, 1982).', '')]

>>>print(re.findall(p_main, t2))
[('', 'The system, called BusTUC is built upon the classical system CHAT-80 (Warren and Pereira, 1982) fgbhdr was a state of the art natural.')]

在这两种情况下，你都会得到带引号的句子。

一个好的资源是python正则表达式documentation和随附的正则表达式howto页面。

干杯

Answer 2

text = "He lives in Nidarvoll and tonight i must reach a train to Oslo at 6 oclock. The system, called BusTUC is built upon the classical system CHAT-80 (Warren and Pereira, 1982). CHAT-80 was a state of the art natural language system that was impressive on its own merits."

您可以将文本拆分为句子列表，然后选择以＆＃34;）＆＃34;结尾的文本。

sentences = text.split(".")[:-1]

for sentence in sentences:
    if sentence[-1] == ")":
        print sentence

PYTHON - 如何从文本文件中提取包含引文标记的句子

2 个答案: