python 用关键字重新拆分字符串，除非它前面有特定的关键字

发布于07月28日

代码如下:

text = "Sir John Doe, married to Mrs Jane Doe, Sir Jack Doe, Mrs Mary Doe" 
splitter = re.split('Sir|Mrs', text)

我希望文本被单词"Sir"或"Mrs"分割，除非前面有字符串"married to".

Current output:

''
'John Doe, married to'
'Jane Doe,'
'Jack Doe,'
'Mary Doe'

Desired output:

''
'John Doe, married to Mrs Jane Doe,'
'Jack Doe,'
'Mary Doe'

推荐答案

我在这里使用re.findall方法:

text = "Sir John Doe, married to Mrs Jane Doe, Sir Jack Doe, Mrs Mary Doe"
matches = re.findall(r'\b(?:Sir|Mrs) \w+ \w+(?:, married to (?:Mrs|Sir) \w+ \w+)?', text)
print(matches)

此打印:

['Sir John Doe, married to Mrs Jane Doe', 'Sir Jack Doe', 'Mrs Mary Doe']

此处使用的正则表达式模式表示要匹配:

\b(?:Sir|Mrs)                         leading Sir/Mrs
  \w+ \w+                             first and last names
(?:
    , married to (?:Mrs|Sir) \w+ \w+  optional 'married to' followed by another name
)?                                    zero or one time