How to make a script to find a certain word in text files in a whole directory ?

[idontreallywolf]

I have created 2 different .txt files in the directory of the script called test.txt and test2.txt
and i have written word in each file but different lines. and got the following result after executing the script:

<_io.TextIOWrapper name=[b]'test.txt'[/b] mode='r' encoding='UTF-8'>
<_io.TextIOWrapper name=[b]'test2.txt'[/b] mode='r' encoding='UTF-8'>

I have used the following libs:
from os import listdir
from os.path import isfile, join

What I did was to create a list called db = [], then I have used listdir('.') to iterate trough each item in the current directory.
after that by using endswith method if dir_.endswith('.txt'): i have been able to only read the txt files.
and then last part was to read each file and see if it was containing the word word.
with open(dir_,'r') as file_: