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annotate python/abstract.py @ 333:998d3c276b25

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http://askubuntu.com/questions/168117/how-to-automatically-add-meta-tags-to-screenshot?rq=1
author Jeff Hammel <jhammel@mozilla.com>
date Tue, 18 Jun 2013 14:44:14 -0700
parents fe8befc5bdfc
children
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1
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2 def abstractmethod(method):
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3 line = method.func_code.co_firstlineno
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4 filename = method.func_code.co_filename
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5 def not_implemented(*args, **kwargs):
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6 raise NotImplementedError('Abstract method %s at File "%s", line %s should be implemented by a concrete class' % (repr(method), filename, line))
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7 return not_implemented
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8
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9 class AbstractBaseClass(object):
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10
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11 @abstractmethod
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12 def foo(self, arg):
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13 """foo does such and such"""
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15 @abstractmethod
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16 def bar(self):
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17 """bar does something else"""
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19 class ConcreteClass(AbstractBaseClass):
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21 def foo(self, arg):
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22 print 'hello'
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23
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24 if __name__ == '__main__':
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25 c = ConcreteClass()
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26 c.foo(1)
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27 a = AbstractBaseClass()
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28 try:
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29 a.foo(1)
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30 except NotImplementedError, e:
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31 print e
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32 try:
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33 a.bar()
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34 except NotImplementedError, e:
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35 print e
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36 c.foo(1)
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37 a.foo(1)
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