Python: Class and instance variables

A class variable is a variable common to the class. Instance variables are variables that are used only by that instance. This is a memorandum of understanding for beginners.

Example

class enemy:
    #Class variables
    #Variables shared between instance objects
    ENEMY_MAX = 100  #Maximum number of enemies
    CHARACTER = 'Ｏ' #Enemy display character

    def __init__(self,x,y):
    #Instance variables
    #Variables not shared between instance objects
　       self.alive = True #Enemy alive flag
  　     self.x = x        #Enemy x coordinate
    　   self.y = y        #Enemy y coordinate

To ensure access to class variables, use "class.variable name" both inside and outside the class.

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