Class Variables

Class variables are shared among all instances of a class. They are associated with the class rather than any particular instance.

• Declared outside of any method in the class.
• Found at top level of the class definition.

class ClassName:
	''' Optional docstring '''
	# Class variables defined here
	class_var1 = value1
	...
	
	def __init__(self, attribute1, ...):
		self.attribute1 = attribute1
		...
	...

Instance Variables

Instance variables are specific to each instance of a class. Each instance has its own set of instance variables.

• Declared within the __init__ constructor method or any other method of the class
• Accessed using the self keyword within methods.
• Used to store data that varies between instances.

class ClassName:
	''' Optional docstring '''
	# Class variables defined here
	class_var1 = value1
	...
	
	def __init__(self, attribute1, ...): # defining instance variables
		self.attribute1 = attribute1 
		...
	...