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Nested classes: How to put a class inside another in Python

/ Published in: Python
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  1. class DisneyCharacter():
  2.  
  3.     # This variable holds the name for the class DisneyCharacter
  4.     name = ""
  5.  
  6.     class Duck():
  7.  
  8.         # This variable holds the name for the class Duck
  9.         name = ""
  10.  
  11.         def __init__(self, name = None):
  12.             """ Constructor for the class Duck """
  13.             # If the user doesn't specify a second name, "Duck" will be chosen
  14.             if (name is None): name = "Duck"
  15.             self.name = name
  16.  
  17.         def getName(self):
  18.             """ Returns the name stored in the class Duck """
  19.             return self.name
  20.  
  21.     def __init__(self, name = None, secondName = None):
  22.         """ Constructor for the class DisneyCharacter """
  23.         # If the user doesn't specify a name, "Donald" will be chosen
  24.         if (name is None): name = "Donald"        
  25.         # Creates a new instance of Duck
  26.         newDuck = DisneyCharacter.Duck(secondName)
  27.         # This will join together the names from the classes DisneyCharacter and Duck
  28.         self.name = name + " " + newDuck.getName()
  29.  
  30.     def getName(self):
  31.           """ Returns the name stored in the class DisneyCharacter """
  32.           return self.name
  33.  
  34. # Creates an instance of the class DisneyCharacter
  35. donald = DisneyCharacter()
  36.  
  37. # Writes "Donald Duck"
  38. print(donald.getName())
  39.  
  40. # Writes "Daisy Duck"
  41. daisy = DisneyCharacter("Daisy")
  42. print(daisy.getName())
  43.  
  44. # Writes "Scrooge McDuck"
  45. unclescrooge = DisneyCharacter("Scrooge", "McDuck")
  46. print(unclescrooge.getName())

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