如果在文本文件中的两个不同字符之间，Python

Question

I am basically trying to use python for a find and replace, but make it only apply to strings between "{s:" and the following "},". I have a long text file of many of the following:

["c", "DashedSentence", {s: "Yo limpio mi cuarto todos los sábados."},
      "Question",       {q: "¿Cuándo limpio mi cuarto?",
                         as: ["Todos los sábados.",
                              "Todos los domingos."]}],

["c", "DashedSentence", {s: "Nosotros contestamos el correo cada semana."},
      "Question",       {q: "¿Con qué frecuencia contestamos el correo?",
                         as: ["Cada semana.",
                              "Cada dos semanas."]}],

In the end, I want phrases grouped together by underscores within the "s:" sections, by replacing " mi " with " mi_" to yield "mi_cuarto", and similarly with "los" "el" ... and many more that aren't in the given examples.

All I have so far is:

s = open("stimuli.txt").read()

word = [' mi ','los ']
phrase = [' mi_',' los_']

for i in range(len(word)):
    if BETWEEN "{s:" and "},":
        s = s.replace(word[i],phrase[i])

f = open("stimuli_phrases.txt", 'w')
f.write(file)

Of course, BETWEEN isn't real, that's what I'm looking for. I might not be approaching the problem the right way, so I'm also open to any alternative ideas! I appreciate the help, thanks!

edit: The desired output groups noun phrases and prepositional phrases with in the {s:} sections, like so:

["c", "DashedSentence", {s: "Yo limpio mi_cuarto todos_los_sábados."},
      "Question",       {q: "¿Cuándo limpio mi cuarto?",
                         as: ["Todos los sábados.",
                              "Todos los domingos."]}],

["c", "DashedSentence", {s: "Nosotros contestamos el_correo cada_semana."},
      "Question",       {q: "¿Con qué frecuencia contestamos el correo?",
                         as: ["Cada semana.",
                              "Cada dos semanas."]}],

Answer 1

The file you gave is JSON formatted , which mean it could easily be parsed with the builtin python json library :

import json

with open("/path/to/your/file", "r") as f:
    data = json.load(f)

for item in data:
    try:
        s = item['s']
    except (TypeError, KeyError):
        pass

Of course, if you do not want or can parse this file as json, you could use the re library :

import re
to_process = re.findall("{s:\"(.+)}\"", yourtext)

To learn or practice with regex, look at there: https://regexr.com/