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Viewing changes to presentation.en/examples/property_01.py

  • Committer: Fabien Pinckaers
  • Date: 2009-08-04 16:14:19 UTC
  • Revision ID: fp@tinyerp.com-20090804161419-vwan9tdtjheeua87
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presentation.en/examples/property_01.py
 
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#!/usr/bin/env python
 
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# examples/property_01.py
 
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def make_spamm():
 
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    return "Spamm!"
 
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def is_valid(value):
 
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    if "spamm" not in value.lower():
 
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        return False
 
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    return True
 
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class Foo(object):
 
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    def _get_spamm(self):
 
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        return make_spamm()
 
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    def _set_spamm(self, value):
 
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        if is_valid(value):
 
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            self.__dict__['spamm'] = value
 
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        else:
 
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            raise ValueError('I want my spamm!')
 
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    spamm = property(_get_spamm, _set_spamm, None, "Tasty spamm")
 
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if __name__ == '__main__':
 
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    import traceback as tb
 
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    f = Foo()
 
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    print f.spamm
 
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    try:
 
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        f.spamm = "Canned spamm"
 
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        f.spamm = "Eggs"
 
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    except ValueError, exc:
 
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        tb.print_exc()
 
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    try:
 
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        del f.spamm
 
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    except AttributeError, exc:
 
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        tb.print_exc()