How to remove lines starting with any prefix using Python?

To remove lines starting with any prefix in Python, you can use regular expressions or simple string operations. Here is an example using regular expressions and the re module:

import re

prefix = "prefix" # the prefix you want to remove

with open('file.txt', 'r') as f:
    filtered_lines = [line for line in f if not re.match('^'+prefix, line)]

with open('new_file.txt', 'w') as f:
    f.writelines(filtered_lines)

This reads lines from a file, removes lines that start with the specified prefix using regular expression and writes the remaining lines to a new file. Alternatively, you can use the string method startswith() to check if the line starts with the specified prefix and skip it if it does. Here is an example:

prefix = "prefix" # the prefix you want to remove

with open('file.txt', 'r') as f:
    filtered_lines = [line for line in f if not line.startswith(prefix)]

with open('new_file.txt', 'w') as f:
    f.writelines(filtered_lines)

This code reads lines from a file, removes lines that start with the specified prefix using the startswith() method and writes the remaining lines to a new file.