使用正则表达式匹配记录中的名称,对话和操作

Question

给定如下面的字符串对话,我需要找到对应于每个用户的句子.

text = 'CHRIS: Hello, how are you...
PETER: Great, you? PAM: He is resting.
[PAM SHOWS THE COUCH]
[PETER IS NODDING HIS HEAD]
CHRIS: Are you ok?'

对于上面的对话,我想返回带有三个元素的元组:

1)该人的姓名

2)小写和

3)括号内的句子

像这样的东西:

('CHRIS','你好,你好吗......',无)

('彼得','太棒了,你呢？',无)

('PAM','他正在休息','PAM表示COUCH.彼得正在点头他的头')

('CHRIS','你还好吗？',没有)

等等

我正在尝试使用正则表达式来实现上述目标.到目前为止,我能够通过以下方式获取用户的姓名.我正在努力识别两个用户之间的句子.

('CHRIS', 'Hello, how are you...', None)

('PETER', 'Great, you?', None)

('PAM', 'He is resting', 'PAM SHOWS THE COUCH. PETER IS NODDING HIS HEAD')

('CHRIS', 'Are you ok?', None)

etc...

任何帮助深表感谢.

Answer 1

你可以这样做re.findall:

>>> re.findall(r'\b(\S+):([^:\[\]]+?)\n?(\[[^:]+?\]\n?)?(?=\b\S+:|$)', text)
[('CHRIS', ' Hello, how are you...', ''),
 ('PETER', ' Great, you? ', ''),
 ('PAM',
  ' He is resting.',
  '[PAM SHOWS THE COUCH]\n[PETER IS NODDING HIS HEAD]\n'),
 ('CHRIS', ' Are you ok?', '')]

您将不得不弄清楚如何自己删除方括号,这仍然无法使用正则表达式,同时仍尝试匹配所有内容.

正则表达式细分

\b              # Word boundary
(\S+)           # First capture group, string of characters not having a space
:               # Colon
(               # Second capture group
    [^          # Match anything that is not...
        :       #     a colon
        \[\]    #     or square braces
    ]+?         # Non-greedy match
)
\n?             # Optional newline
(               # Third capture group
    \[          # Literal opening brace
    [^:]+?      # Similar to above - exclude colon from match
    \] 
    \n?         # Optional newlines
)?              # Third capture group is optional
(?=             # Lookahead for... 
    \b          #     a word boundary, followed by  
    \S+         #     one or more non-space chars, and
    :           #     a colon
    |           # Or,
    $           # EOL
)