How to xtract multiple numbers delimited by brackets from a txt document into a python list?

Question

So I have a .txt file which looks like the following:

[some_strings] id:[1227194]
[some_strings] id:[1227195]
[some_strings] id:[1227196]

What I need to do is to extract all the numbers in between the brackets [] and append them in a list which I will then use for further analysis. The final result should then be:

list = [1227194,1227195,1227196]

What would be the most pythonic way to achieve this?

Answer 1

try this:

import re

filename = 'text.txt'

with open(filename) as file:
    lines = file.readlines()
    lines = " ".join(line.rstrip() for line in lines)    
    num_list = re.findall('\d+',lines)
num_list

output:

['1227194', '1227195', '1227196']