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Once a procedure is named and written, it can be called at any point in the program.

To call a procedure in Python, simply use its name (include the brackets):

Suppose you wanted to print out player information at the following points in a game:

• at the end of a level
• when the player loses a life
• when the player beats the high score
• when the game is over

Each time you needed to print out the player information, you could simply call the procedure:

def update_display():
	print("Your score: " + str(score))
	time.sleep(1)
	print("High score: " + str(high_score))
	time.sleep(1)
	print("Lives remaining: " + str(lives))
	time.sleep(1)

# End of level
update_display()

# Lose a life
update_display()

# New high score
update_display()

# Game over
update_display()

Using this procedure greatly reduces the amount of code that has to be included in the program.