Question

您好我有以下数据：

hello this is a car
<hamburguer>this car is very good<\hamburguer>I want to fill this rules 
this pencil is red and very good, the movie was very fine
<red>the color is blue and green<\red>
<blue>your favorite color is the yellow<\blue>you want this<red>my smartphone is very expensive<\red>

从这些数据我得到如下列表：

lines = ['hello this is a car','<hamburguer>this car is very good<\hamburguer>I want to fill this rules','this pencil is red and very good, the movie was very fine','<red>the color is blue and green<\red>','<blue>your favorite color is the yellow<\blue>you want this<red>my smartphone is very expensive<\red>']

我想从这个列表中构建以下字典，这是我期望的输出：

dict_tags = {<hamburguer>:['this car is very good'],<red>:['the color is blue and green','my smartphone is very expensive'],<blue>:['your favorite color is the yellow']}

由于我不知道如何继续，我尝试了以下内容：

for line in lines:
    pattern = re.search(r"(?<=>)(.*)(?=<)",line)
    if pattern:
        list_tags.append(pattern.group())

然而问题是我刚刚得到：

['this car is very good', 'the color is blue and green', 'your favorite color is the yellow<\x08lue>you want this<red>my smartphone is very expensive']

所以我需要支持来构建我需要的字典，感谢支持，我需要标签之间的数据，例如：

<red>the color is blue and green<\red>

我需要提取标签：

<red>

和信息：

the color is blue and green

Answer 1

使用 re.findall() 功能和 collections.defaultdict 对象：

import re, collections

s = '''hello this is a car
<hamburguer>this car is very good<\\hamburguer>I want to fill this rules 
this pencil is red and very good, the movie was very fine
<red>the color is blue and green<\\red>
<blue>your favorite color is the yellow<\\blue>you want this<red>my smartphone is very expensive<\\red>'''

tags_dict = collections.defaultdict(list)
tags = re.findall(r'<([^>]+)>([^<>]+)(<\\\1>)', s)    # find all tags

for tag_open, value, tag_close in tags:
  tags_dict[tag_open].append(value)    # accumulate values for the same tag

print(dict(tags_dict))

输出：

{'hamburguer': ['this car is very good'], 'red': ['the color is blue and green', 'my smartphone is very expensive'], 'blue': ['your favorite color is the yellow']}

Answer 2

仅使用re.finditer。

正则表达式：<([^>]+)>([^>]+)<\\\1>

lst = {}
for item in re.finditer(r'<([^>]+)>([^>]+)<\\\1>', input):
    lst.setdefault('<%s>' % item.group(1),[]).append(item.group(2))

输出：

{'<red>': ['the color is blue and green', 'my smartphone is very expensive'], '<blue>': ['your favorite color is the yellow'], '<hamburguer>': ['this car is very good']}

Code demo

如何使用正则表达式从列表中构建以下字典？

2 个答案: