07_Class_Animal__Scope.py

# Each individual animal gets its own name and age (since they’re all initialized individually), but they all have access to the member variable is_alive, since they’re all members of the Animal class.



class Animal(object):
  """Makes cute animals."""
  is_alive = True
  def __init__(self, name, age):
    self.name = name
    self.age = age

zebra = Animal("Jeffrey", 2)
giraffe = Animal("Bruce", 1)
panda = Animal("Chad", 7)

print zebra.name, zebra.age, zebra.is_alive
print giraffe.name, giraffe.age, giraffe.is_alive
print panda.name, panda.age, panda.is_alive





"""
The scope of a variable is the context in which it’s visible to the program.

Not all variables are accessible to all parts of a Python program at all times. 

When dealing with classes, you can have:

* variables that are available everywhere (global variables), 
* variables that are only available to members of a certain class (member variables), and 
* variables that are only available to particular instances of a class (instance variables).

The same goes for functions: some are available everywhere,
some are only available to members of a certain class, 
and still others are only available to particular instance objects.
"""