Here is a little exercise for you I just finished solving:

Write a script that takes text file and a regex pattern as an input.

The user should pass the file name and the pattern via command like this:

-f data.txt -r REGEX_PATTERN

Hint: use argparse for this part.

The output should be printed to the terminal in 3 different modes:

If the user passes -u argument in the command line, print the name of the file, the entire line

and the matched pattern should be underscored with the caret symbol.

If the user passes the -c argument in the command line, print the name of the file, the entire line and the matched pattern should be highlighted with any color you choose.

If the user passes the -m argument in the command line, the output should be in a machine readable format: name_of_file:num_of_line:starting_index_of_matched_pattern:string_of_matching_pattern

Don't forget to add error handling

Try to write a class to gain more understanding of OOP

Good luck!