GUI vs. CLI

The Python programs that you can write with Python’s built-in functions only deal with text through the print() and input() functions. Your program can display text on the screen and let the user type in text from the keyboard. This type of program has a command line interface, or CLI (which is pronounced like the first part of ―climb‖ and rhymes with ―sky‖). These programs are somewhat limited because they can’t display graphics, have colors, or use the mouse. These CLI programs only get input from the keyboard with the input() function and even then the user must press Enter before the program can respond to the input. This means real-time (that is, continuing to run code without waiting for the user) action games are impossible to make.
Pygame provides functions for creating programs with a graphical user interface, or GUI (pronounced, ―gooey‖). Instead of a text-based CLI, programs with a graphics-based GUI can show a window with images and colors.

The simple Hello world with Pygame

import pygame, sys

from pygame.locals import *

pygame.init()

DISPLAYSURF = pygame.display.set_mode((400, 300))

pygame.display.set_caption('Hello World!')

while True: # main game loop

for event in pygame.event.get():

if event.type == QUIT:

pygame.quit()

sys.exit()

pygame.display.update()

OutPut

Pygame Modules

pygame.BufferProxy	pygame.cdrom	pygame.Color
pygame.display	pygame.draw	pygame.cursors
pygame.event	pygame.event	pygame.font
pygame.image	pygame.key	pygame.freetype
pygame.example	pygame.gfxdraw	pygame.joystick
pygame.locals	pygame.mixer	pygame.mouse
pygame.mixer.music	pygame.overlay	pygame.Rect
pygame.Surface	pygame.time	pygame.tests
pygame.transform	pygame.sprite	pygame.scrap

Python gaming with pygame

GUI vs. CLI

The simple Hello world with Pygame

OutPut

Pygame Modules