Deriving Standard Types : subclass « Class « Python Tutorial

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Python Tutorial » Class » subclass   11. 29. 6. Deriving Standard Types class RoundFloat(float):     def __new__(cls, val):         return super(RoundFloat, cls).__new__(cls, round(val, 2)) print RoundFloat(1.5955) print RoundFloat(1.5945) print RoundFloat(-1.9955) 11. 29. subclass 11. 29. 1.  Creating Subclasses 11. 29. 2.  Class Inheritance 11. 29. 3.  __bases__ Class Attribute 11. 29. 4.  Overriding Methods through Inheritance 11. 29. 5.  __init__() is not invoked automatically when the subclass is instantiated. 11. 29. 6.  Deriving Standard Types 11. 29. 7.  Mutable Type Example 11. 29. 8.  Definition and test function for class Cylinder.

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