Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “The color() method takes the red, green, and blue channels, respectively, as arguments.”

A block of code is set as follows:

import pygame pygame.init()screen_width = 800 screen_height = 200 screen = pygame.display.set_mode((screen_width,                  screen_height))

done = False white = pygame.Color(255, 255, 255)pygame.font.init()font = pygame.font.SysFont(‘Comic Sans MS’, 120, False, True)text = font.render(‘Penny de Byl’, False, white)while not done:  for event in pygame.event.get():    if event.type == pygame.QUIT:      done = True   screen.blit(text, (10, 10))  pygame.display.update()pygame.quit()

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

background = pygame.image.load(‘images/background.png’)sprite = pygame.image.load(‘images/Bird-blue-icon.png’)while not done:  for event in pygame.event.get():    if event.type == pygame.QUIT:      done = True   screen.blit(background, (0, 0))  screen.blit(sprite, (100, 100))
  pygame.display.update()pygame.quit()

Any command-line input or output is written as follows:

tick=2, fps=714.2857055664062
tick=1, fps=714.2857055664062
tick=1, fps=714.2857055664062
tick=1, fps=666.6666870117188
tick=2, fps=666.6666870117188

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Now, all you have to do is press Play to see the results.”

Tips or important notes

Appear like this.