virtualmethod 0.0.1

virtualmethod is a decorator to prevent base class methods from being called directly.

Usage

from virtualmethod import virtualmethod

class Base(object):
 @virtualmethod
 def my_virtual_method(self):
 print "This is a virtual method. Call me from a subclass!"

class A(Base):
 pass

class B(Base):
 def my_virtual_method(self):
 print "I went ahead and implemented my own version."

base = Base()
a = A()
b = B()

a.my_virtual_method()
-> This is a virtual method. Call me from a subclass!

b.my_virtual_method()
-> I went ahead and implemented my own version.

base.my_virtual_method()
-> Traceback (most recent call last):
 File "", line 1, in
 File "virtualmethod/core.py", line 11, in __call__
 raise TypeError("Virtual method %s must be called from a subclass." % self.__name__)
TypeError: Virtual method my_virtual_method must be called from a subclass.

Note(s)

@virtualmethod works with @classmethod and @staticmethod, but must be declared first, i.e.:

@virtualmethod
@classmethod
def my_virtual_class_method(cls):
 ...


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Requirements:

· Python