Delete Lines that Contain Words - Loop through files in a folder - Write to new files

[heiner55]

#!/usr/bin/python3
import os

def remove_line_from_file(filename, dirpath):
    filename  = os.path.join(dirpath, filename)
    temp_path = os.path.join(dirpath, filename + '.tmp')
    search_keywords = ['Car','Train']

    with open(filename, 'r') as f_read, open(temp_path, 'w') as temp:
        for line in f_read:
            found = False
            for word in search_keywords:
                if word in line:
                    found = True
            if not found:
                temp.write(line)

    #os.rename(temp_path, filename)

#main
directory = './'
for root, dirs, files in os.walk(directory):
    for f in files:
        remove_line_from_file(f, directory)
#done