有条件地在Python中拆分字符串

Question

I have a string that looks like this: 我有一个看起来像这样的字符串：

Increase (decrease)      1,334      (     2,921)     2,797

I'd like to split the string to look like this: 我想将字符串拆分为如下所示：

['Increase (decrease)', '1,334', '(2,921)', '2,797']

I've tried: 我试过了：

item=re.split(r'\s{3,}', strg)

But clearly this yields: 但显然这会产生：

['Increase (decrease)', '1,334', '(', '2,921)', '2,797']

Any help would be greatly appreciated. 任何帮助将不胜感激。

Answer 1

I would remove all spaces after an opening parenthesis and then split: 我会删除一个左括号后的所有空格然后拆分：

>>> re.split(r'\s{3,}', re.sub(r"(?<=\()\s+", "", s))
['Increase (decrease)', '1,334', '(2,921)', '2,797']

Note that (?<=\\() is a positive lookbehind . 请注意(?<=\\()是一个积极的看法。

Answer 2

You can replace the spaces between parenthesis and then split: 您可以替换括号之间的空格然后拆分：

>>> re.split(r'\s{3,}',re.sub(r'(?<=\()\s+','',s))
['Increase (decrease)', '1,334', '(2,921)', '2,797']