CODEWITHSUNDEEP
python
user1469270
user1469270

Reputation:

Child classes and parent classes in Python

I'm currently watching Bucky's Python Programming tutorials. He has explained the concept of child classes and parent classes, like so:

class Dad:
    var1 = "Hey I'm Dad"

class Mum:
    var2 = "Hey I'm Mum"

class Child(Mum, Dad):
    var3 = "Hey I'm a Child"

This, I understand completely. However, he then turns the classes into an object:

childObject = Child()

dadObject = Dad()

Why would he bother doing this, if he can just call Child.var3 to get the same result as childObject.var3?

Upvotes: 1

Views: 3330

Answers (1)

Joran Beasley
Joran Beasley

Reputation: 113978

a better example is

class Person:
    name="Person"
    def speak(self):
        print "Hi! Im %s"%slf.name

class Dad(Person):
     name = "Dad"

class Mom(Person):
     name = "Mom"

class Child(Person):
     name = "a Child"
     age  = 5
     def speak(self):
        print "Hewwo, I am a %d year old child!"%self.age

d = Dad()
m = Mom()
c = Child()

c.speak()
m.speak()
d.speak()

as to the difference (your question of static class access versus instance access)

class Child:
   var3 = "whatever"

c = Child()
c.var3 = "something_else"

print c.var3
print Child.var3

Upvotes: 4

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