Delegates: Difference between revisions

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==[[Python]]==

[[Category:Python]]

<pre>

class Delegator:

def __init__(self, delegate=None):

self.delegate = delegate

def thing(self):

if hasattr(self.delegate, 'thing'):

return self.delegate.thing()

return 42

def other(self):

if hasattr(self.delegate, 'other'):

return self.delegate.thing()

return 5

class Delegate:

def thing(self):

return 37

if __name__ == '__main__':

# No delegate

a = Delegator()

assert a.thing() == 42

assert a.other() == 5

# With delegate

a.delegate = Delegate()

assert a.thing() == 37

assert a.other() == 5

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