python find txt files under all directory code example

Example 1: python read all text files in directory

import os
from re import search

arr = os.listdir()
strtxt = ".txt"
for txtfile in arr:
    if txtfile.__contains__(strtxt):
        fileObject = open(txtfile, "r")
        data = fileObject.read()
        print(data)

Example 2: python search all txts in a folder

index_file =  open('index.txt', 'r')
    for line in index_file:
       ....