Core Python Programming (2nd Edition)

9-15. Copying Files. Prompt for two filenames (or better yet, use command-line arguments).
The contents of the first file should be copied to the second file.
9-16. Text Processing. You are tired of seeing lines on your e-mail wrap because people type
lines that are too long for your mail reader application. Create a program to scan a
text file for all lines longer than 80 characters. For each of the offending lines, find the
closest word before 80 characters and break the line there, inserting the remaining
text to the next line (and pushing the previous next line down one). When you are
done, there should be no lines longer than 80 characters.
9-17. Text Processing. Create a crude and elementary text file editor. Your solution is menudriven,
with the following options:
1.
2.
3.
4.
5.
create file [prompt for filename and any number of lines of input],
display file [dump its contents to the screen],
edit file (prompt for line to edit and allow user to make changes),
save file, and
quit.
9-18. Searching Files. Obtain a byte value (0-255) and a filename. Display the number of
times that byte appears in the file.