正则表达式：如何匹配 2 个模式并将其保存到字典中？

Question

我需要从 log.txt 中创建一个像这样的字典列表（匹配主人和他们的宠物类型）

dictionary = {
  "Sophia": "Cat",
  "Julia": "Bird",
  "Max": "Dog"
}

log.txt

Pet Owner : Sophia
    Colour : Blue
    Pet Type : Cat
    From : India
    Price : High

Pet Owner : Bruce
    Not own pet

Pet Owner : Sean
    Not own pet

Pet Owner : Julia
    Colour : Yellow
    Pet Type : Bird
    From : Israel
    Price : Low

Pet Owner : Bean
    Not own pet

Pet Owner : Max
    Colour : Green
    Pet Type : Dog
    From : Italy
    Price : Normal

Pet Owner : Clarie
    Not own pet

到目前为止我所尝试的

import re

log = open("log.txt", "r")
txt = log.read()
log.close()

x = re.search("^Pet.Owner.+", txt)
print(x.group())

我卡在这里，我不知道如何让正则表达式返回我想要的 2 关键字并将其保存到 dictionary.txt。

Answer 1

你可以使用回火贪婪令牌，见regex101：

s = '''Pet Owner : Sophia
    Colour : Blue
    Pet Type : Cat
    From : India
    Price : High

Pet Owner : Bruce
    Not own pet

Pet Owner : Sean
    Not own pet

Pet Owner : Julia
    Colour : Yellow
    Pet Type : Bird
    From : Israel
    Price : Low

Pet Owner : Bean
    Not own pet

Pet Owner : Max
    Colour : Green
    Pet Type : Dog
    From : Italy
    Price : Normal

Pet Owner : Clarie
    Not own pet'''

import re

out = dict( re.findall(r'Pet Owner : (\w+)(?:(?!Pet Owner :).)*Pet Type : (\w+)', s, flags=re.DOTALL) )

print(out)

打印：

{'Sophia': 'Cat', 'Julia': 'Bird', 'Max': 'Dog'}