How to Rewrite Multiple Lines in the Console?

Rewriting Multiple Lines in the Console: Beyond the Last Line

Reprinting multiple lines in the console proves to be a particular challenge. While it's feasible to alter the last displayed line with "r," customizing previous lines remains an elusive task.

Understanding the Need

This issue surfaces in various scenarios:

• RPGs: Dynamically displaying multiple lines of text for a text-based role-playing game.
• Progress Tracking Applications: Updating separate lines dedicated to progress bars and status descriptions.

Cross-Platform Solutions

The ideal solution caters to both Unix and Windows environments:

• Unix: The curses module provides a comprehensive toolkit for terminal control.

• Windows: Multiple options exist, including:

  • PDCurses: A popular port of curses
  • Console module: Recommended by documentation
  • wconio
  • win32console

A Simple Example with curses

Using curses, rewriting multiple lines becomes a straightforward task:

import curses
import time

def report_progress(filename, progress):
    stdscr.addstr(0, 0, "Moving file: {0}".format(filename))
    stdscr.addstr(1, 0, "Total progress: [{1:10}] {0}%".format(progress * 10, "#" * progress))
    stdscr.refresh()

if __name__ == "__main__":
    stdscr = curses.initscr()
    curses.noecho()
    curses.cbreak()

    try:
        for i in range(10):
            report_progress("file_{0}.txt".format(i), i+1)
            time.sleep(0.5)
    finally:
        curses.echo()
        curses.nocbreak()
        curses.endwin()

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