How to filter file content in python

Inpython, you can use the following methods to filter file content:

1. Use thereadlines()method to read all lines of the file and use conditional statements to filter the content. For example, to filter out lines containing a specific keyword:

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

2. Use aforloop to read the file line by line, and then use conditional statements to filter the content. For example, to filter out lines longer than 10:

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

3. Useregular expressionsmodulereto match and filter content. For example, to filter out rows matching a specific pattern:

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)]

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