# This script installs the curses module for Python using the pip package manager.

# First, we need to import the pip module to use its functions.
import pip

# Next, we use the pip module to install the curses module for Python.
pip.main(['install', 'curses'])

# The main function of pip takes in a list of arguments, with the first argument being the command to execute and the following arguments being the options and packages to install.

# The 'install' command tells pip to install the specified packages.

# The 'curses' package is the one we want to install in this case.

# By using the main function of pip, we can easily install packages from within a Python script.

# This is useful for automating the installation process or for creating scripts that require specific packages to be installed.

# Once the script is executed, the curses module will be installed and ready to use in your Python projects.

import curses # import curses library for terminal manipulation
from time import sleep # import sleep function from time library for animation effect

def main():
    stdscr = curses.initscr() # initialize screen
    curses.noecho() # turn off echoing of keys
    curses.cbreak() # disable buffered input
    stdscr.keypad(True) # enable keyboard arrows
    curses.start_color() # enable colors
    stdscr.clear() # clear screen
    stdscr.addstr("Welcome to the Curses World!") # add string to screen
    stdscr.refresh() # refresh screen
    
    while True:
        key = stdscr.getkey() # get user input
        
        if key == 'q': # exit program when q is pressed
            curses.endwin() # end window and restore terminal settings
            break
        
        elif key in ['up', 'down', 'left', 'right']: # handle arrow keys
            # use match statement to handle different arrow key inputs
            match key:
                case 'up': stdscr.move(0, -1) # move cursor up one line
                case 'down': stdscr.move(0, 1) # move cursor down one line
                case 'left': stdscr.move(-1, 0) # move cursor left one column
                case 'right': stdscr.move(1, 0) # move cursor right one column
                
            stdscr.clrtoeol() # clear line to the end of screen
            stdscr.refresh() # refresh screen
        
        sleep(0.2) # add delay for animation effect
    
    curses.endwin() # end window and restore terminal settings

if __name__ == '__main__':
    main()

#!/bin/bash
# This is a bash script that uses the curses library to create a simple interactive program.
# It starts by importing the curses library.
import curses
# Next, it defines a function called main that will be the main body of the program.
def main():
    # The curses library is initialized and assigned to the variable stdscr.
    stdscr = curses.initscr()
    # The curses library is configured to not display user input on the screen.
    curses.noecho()
    # The curses library is configured to not wait for the user to press enter after each input.
    curses.cbreak()
    # The curses library is configured to enable special keys like arrow keys to be captured.
    stdscr.keypad(True)
    # A loop is started to continuously listen for user input.
    while True:
        # The program waits for the user to press a key and assigns the key to the variable key.
        key = stdscr.getch()
        # If the user presses the 'q' key, the program exits.
        if key == ord('q'):
            break
        # If the user presses an arrow key, the program moves the cursor accordingly.
        elif key == curses.KEY_LEFT:
            stdscr.addstr(0, 0, 'Left arrow pressed')
        elif key == curses.KEY_RIGHT:
            stdscr.addstr(0, 0, 'Right arrow pressed')
        elif key == curses.KEY_UP:
            stdscr.addstr(0, 0, 'Up arrow pressed')
        elif key == curses.KEY_DOWN:
            stdscr.addstr(0, 0, 'Down arrow pressed')
        # The line is cleared to the end of the screen before refreshing it.
        stdscr.clrtoeol()
        stdscr.refresh()
    # The curses library is reset to its default settings before exiting the program.
    curses.nocbreak()
    stdscr.keypad(False)
    curses.echo()
    curses.endwin()
# The main function is called to start the program.
main()

# This script uses the curses library to create a simple interactive program.
# The curses library is initialized and configured to enable special keys to be captured.
# A loop is started to continuously listen for user input.
# If the user presses the 'q' key, the program exits.
# If the user presses an arrow key, the program moves the cursor accordingly and clears the line to the end of the screen before refreshing it.
# The curses library is reset to its default settings before exiting the program.