python-patterns/strategy.py at master · Problematic/python-patterns · GitHub

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'''http://stackoverflow.com/questions/963965/how-is-this-strategy-pattern-written-in-python-the-sample-in-wikipedia'''

import types

class StrategyExample:

def __init__(self, func=None):

self.name = "Strategy Example 0"

if func :

self.execute = types.MethodType(func, self)

def execute(self):

print(self.name)

def executeReplacement1(self):

print(self.name + " from execute 1")

def executeReplacement2(self):

print(self.name + " from execute 2")

if __name__ == "__main__":

strat0 = StrategyExample()

strat1 = StrategyExample(executeReplacement1)

strat1.name = "Strategy Example 1"

strat2 = StrategyExample(executeReplacement2)

strat2.name = "Strategy Example 2"

strat0.execute()

strat1.execute()

strat2.execute()

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