重新分割特殊情况以分割逗号分隔的字符串

Question

我想使用python re.split（）以逗号将一个句子分割成多个字符串，但我不想将其应用于用逗号分隔的单个单词，例如：

例

s = "Yes, alcohol can have a place in a healthy diet." 
desired result = ["Yes, alcohol can have a place in a healthy diet."] 

另一个例子：

s = "But, of course, excess alcohol is terribly harmful to health in a variety of ways, and even moderatealcohol intake is associated with an increase in the number two cause of premature death: cancer." 
desired output = ["But, of course" , "excess alcohol is terribly harmful to health in a variety of ways" , "and even moderatealcohol intake is associated with an increase in the number two cause of premature death: cancer."] 

任何指针？请。

Answer 1

因为Python不支持可变长度lookbehind assertions在正则表达式，我会使用re.findall()代替：

In [3]: re.findall(r"\s*((?:\w+,)?[^,]+)",s) 
Out[3]: 
['But, of course', 
'excess alcohol is terribly harmful to health in a variety of ways', 
'and even moderatealcohol intake is associated with an increase in the number two cause of premature death: cancer.'] 

说明：

\s*  # Match optional leading whitespace, don't capture that 
(   # Capture in group 1: 
(?:\w+,)? # optionally: A single "word", followed by a comma 
[^,]+  # and/or one or more characters except commas 
)   # End of group 1