what does init () do?

[Waked]

could someone please explain what does init () do?
example:

Python:

from pygame import * init() size = width, height = 1024, 768 screen = display.set_mode(size) badX, badY = 0,0 red = 255, 0, 0 green = 0, 255, 0 running = True myClock = time.Clock() while running:     for evnt in event.get():            # checks all events that happen         if evnt.type == QUIT:             running = False     goodX, goodY = mouse.get_pos()      # input from the user & move good guy     if goodX > badX +5:                 # move bad guy - this is my AI         badX+=5                        elif goodX < badX-5:            badX-=5            if goodY > badY +5:         badY+=5     elif goodY < badY-5:         badY-=5     if ((goodX-badX)**2 + (goodY-badY)**2)**0.5 < 20:   # check interactions         badX, badY = 0,0           screen.fill((0,0,0))                # drawScene     draw.circle(screen, red, (badX, badY), 20)     draw.circle(screen, (0,255,0), (goodX, goodY), 20)     display.flip()         myClock.tick(60)                    # delay quit()

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Mod Edit:
Please wrap you code in either of the following in order to preserve whitespace (indentation) and to highlight the syntax.

code:

[syntax="python"] ... code ... [/syntax] [code] ... code ... [/code ]

[DemonWasp]

Try looking up the documentation: http://www.pygame.org/docs/ref/pygame.html

[Waked]

Thanks alot.