How to detect specific text in a string

Question

I want to make a program that detects if it has a specific "text" in the input typed by the user.

In this example, the "text": 100

I want it to detect this 100 (position independent) in the input. Example: test100 or 100test

I am wanting to develop this program, to delete files. Let’s assume that I have the files: "T100.txt", "A100.txt", "B100.txt". I want it to delete every file that contains "100" in the title.

import os 

#Arquivos
a1 = open('t100.txt', 'r+')
a2 = open('a100.txt', 'r+')
a3 = open('b100.txt', 'r+')

string = input('Você deseja excluir todos os arquivos que contém qual string: ')

if string[] == '100':
    print("Removendo os arquivos que contém '100' no título")
    os.remove()
else:
    print("Não há arquivos que contém '100' no título")

Answer 1

Your code didn’t make much sense, even though it wasn’t meant to be, it was just to try to illustrate. A possible solution, since it is working with files is to use the function glob.glob to get the files that obey a certain regular expression. With regular expression it is possible to check if a certain value exists in the file name.

For example, if you need to search all the scans that have the number 100 in the name, inside the directory arquivos, you can do:

from os import remove
from glob import glob

for arquivo in glob('arquivos/.*100.*'):
    remove(arquivo)

Another solution, if you use Python 3.4+, is to use the package pathlib.

from pathlib import Path

for arquivo in Path('arquivos').glob('.*100.*'):
    arquivo.unlink()