Initializing a class in a new class

[stuabs19]

What is the purpose of line 7?

1 class NewClass (OldClassFile.O ldClass)
2
3 def __init__(self,v ariable)
4
5 (Code for what NewClass does)
6
7 OldClassFile.Ol dClass.__init__ (self,variable)

[bvdet]

Creates an instance of OldClassFile.Ol dClass with all its associated attributes and methods.