Python Classes and Objects
Basic Class and Subclass Syntax
__metaclass__ = type # use new style classes class Artist: def setName(self, name): 'Set the artist name.' # A doc string callable at Artist.setName.__doc__ self.name = name def getName(self): return self.name def introduction(self): print "%s is an artist!" % self.name # Create a subclass for sculptors. class Sculptor(Artist): 'Sculptor is a subclass of Artist' def introduction(self): 'Overrides Artist.introduction()' print "%s is a sculptor!" % self.name artist = Artist() # Create an instance of an artist artist.setName('Vincent van Gogh') # Set name to Vincent van Gogh print artist.getName() # Print to screen: Vincent van Gogh artist.introduction() # Print to screen: Vincent van Gogh is an artist! print artist.setName.__doc__ # Print to screen: Set the artist name sculptor = Sculptor() print sculptor.__doc__ # Print to screen:Sculptor is a subclass of Artist sculptor.setName('Constantin Brancusi') # Set name to Constantin Brancusi sculptor.introduction() # Print to screen: Constantin Brancusi is a sculptor!
class Foo: def alpha(self): print 'One' class Bar: def beta(self): print 'Two' class Baz: def alpha(self): print 'Three' class Qux(Foo, Bar): pass ''' Note Baz will override Foo because it comes first! ''' class Quux(Baz, Foo): pass Q = Qux() Q.alpha() # Print to screen: One Q.beta() # Print to screen: Two Q2 = Quux() Q2.alpha() # Print to screen: Three
Available Wiki Topics
The operator of this site makes no claims, promises, or guarantees of the accuracy, completeness, originality, uniqueness, or even general adequacy of the contents herein and expressly disclaims liability for errors and omissions in the contents of this website.