python中带双括号的正则表达式
python中带双括号的正则表达式
提问于 2020-03-19 07:12:37
我正在尝试解析一些数据，这些数据的格式如下，称为data：
data = '(def-instance Adelphi
(expenses thous$:7-10)
(academic-emphasis biology))
(def-instance Arizona-State
(expenses thous$:4-7)
(academic-emphasis fine-arts))' 我想将数据分成一个列表，第一段在第一个条目中，第二段在第二个条目中，即：
['(def-instance Adelphi
(expenses thous$:7-10)
(academic-emphasis business-administration)
(academic-emphasis biology))',
'(def-instance Arizona-State
(expenses thous$:4-7)
(academic-emphasis fine-arts)']我试着使用命令re.split(r'\(*(\([^()]*\)*)*\)',data)，但是我有点不对劲，我不明白为什么。如果能帮上忙，我们将不胜感激。
回答 2
Stack Overflow用户
发布于 2020-03-19 07:48:01
您可以通过迭代数据、搜索))并根据找到的索引和值创建结果列表来实现这一点。
data = data.split('\n')
result = list()
prev = 0
for idx, value in enumerate(data):
if '))' in value:
result.append('\n'.join(data[prev:idx + 1]))
prev = idx + 1这将输出以下内容：
print(result)
#['(def-instance Adelphi\n (state newyork)\n (control private)\n (no-of-students thous:5-10)\n (male:female ratio:30:70)\n (student:faculty ratio:15:1)\n (sat verbal 500)\n (sat math 475)\n (expenses thous$:7-10)\n (percent-financial-aid 60)\n (no-applicants thous:4-7)\n (percent-admittance 70)\n (percent-enrolled 40)\n (academics scale:1-5 2)\n (social scale:1-5 2)\n (quality-of-life scale:1-5 2)\n (academic-emphasis business-administration)\n (academic-emphasis biology))', '(def-instance Arizona-State\n (state arizona)\n (control state)\n (no-of-students thous:20+)\n (male:female ratio:50:50)\n (student:faculty ratio:20:1)\n (sat verbal 450)\n (sat math 500)\n (expenses thous$:4-7)\n (percent-financial-aid 50)\n (no-applicants thous:17+)\n (percent-admittance 80)\n (percent-enrolled 60)\n (academics scale:1-5 3)\n (social scale:1-5 4)\n (quality-of-life scale:1-5 5)\n (academic-emphasis business-education)\n (academic-emphasis engineering)\n (academic-emphasis accounting)\n (academic-emphasis fine-arts))']在更新后的数据集上：
result
#['(def-instance Adelphi\n (expenses thous$:7-10)\n (academic-emphasis biology))', '(def-instance Arizona-State\n (expenses thous$:4-7)\n (academic-emphasis fine-arts))']Stack Overflow用户
发布于 2020-03-19 07:52:42
拆分位置的一个共同点是，它们都以)结束前一个'set‘，有一个换行符，然后下一个'set’以((开始。这说明了使用后视和前视的方法：
import re
data = '''(def-instance Adelphi
(expenses thous$:7-10)
(academic-emphasis biology))
(def-instance Arizona-State
(expenses thous$:4-7)
(academic-emphasis fine-arts))'''
l = list(re.split(r'(?<=\)\))\s+(?=\()', data))
for item in l:
print (item)
print ()输出(为清楚起见，在单独的行中打印)：
(def-instance Adelphi
(expenses thous$:7-10)
(academic-emphasis biology))
(def-instance Arizona-State
(expenses thous$:4-7)
(academic-emphasis fine-arts))页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/60748759
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