with open('file.txt', 'r') as file:
lines = file.readlines()
filtered_lines = [line for line in lines if 'keyWord' in line]

with open('file.txt', 'r') as file:
filtered_lines = []
for line in file:
if len(line) > 10:
filtered_lines.append(line)

import re

with open('file.txt', 'r') as file:
lines = file.readlines()
pattern = r'^[A-Za-z]+\d+'
filtered_lines = [line for line in lines if re.match(pattern, line)]