嵌套类：如何在Python中将一个类放入另一个类中

Posted 2021-02-25

class DisneyCharacter():
 
    # This variable holds the name for the class DisneyCharacter
    name = ""
 
    class Duck():
 
        # This variable holds the name for the class Duck
        name = ""
 
        def __init__(self, name = None):
            """ Constructor for the class Duck """
            # If the user doesn't specify a second name, "Duck" will be chosen
            if (name is None): name = "Duck"
            self.name = name
 
        def getName(self):
            """ Returns the name stored in the class Duck """
            return self.name
 
    def __init__(self, name = None, secondName = None):
        """ Constructor for the class DisneyCharacter """
        # If the user doesn't specify a name, "Donald" will be chosen
        if (name is None): name = "Donald"        
        # Creates a new instance of Duck
        newDuck = DisneyCharacter.Duck(secondName)
        # This will join together the names from the classes DisneyCharacter and Duck
        self.name = name + " " + newDuck.getName()
 
    def getName(self):
          """ Returns the name stored in the class DisneyCharacter """
          return self.name
 
# Creates an instance of the class DisneyCharacter
donald = DisneyCharacter()
 
# Writes "Donald Duck"
print(donald.getName())
 
# Writes "Daisy Duck"
daisy = DisneyCharacter("Daisy")
print(daisy.getName())
 
# Writes "Scrooge McDuck"
unclescrooge = DisneyCharacter("Scrooge", "McDuck")
print(unclescrooge.getName())