read a text file, find all integers, append to list

[oldtrafford]

I don't understand what you mean by "save the dictionary in a text file"? What file format do you want to use? What are the keys in the dictionary?

This code saves the dictionary as a json format file. For keys I use the filename of the input file.

import json
import re

integer_pattern = re.compile("[+-]?[0-9]+")

def get_numberes_from_file(filename):
    numbers = []
    with open(filename, "r") as file:
        for line in file:
            if line.startswith("*Nset"):
                break
        for line in file:
            if line.startswith("*Text"):
                break
            numbers += map(int, re.findall(integer_pattern, line))
    print(numbers)
    return numbers

input_files = ["test.txt", "test2.txt", "test3.txt"]
numbers = {}
for filename in input_files:
    numbers[filename] = get_numberes_from_file(filename)

with open("output.inp", "w") as file:
    json.dump(numbers, file, indent=4)

I don't understand what you were doing with the short name output files.

Thank you very much :), it's exactly what I needed to make my program work. you save my day :)