Add Singleton design pattern example #444
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grimley517
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Jul 4, 2025
| @@ -0,0 +1,17 @@ | |||
| """ | |||
| Singleton Pattern Example | |||
| Ensures a class has only one instance and provides a global point of access to it. | |||
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In line with doctoring standards - could the second line of this doctoring be empty please. (add empty line)
See https://github.com/faif/python-patterns/blob/master/patterns/structural/facade.py for an example of a good docString. Unfortunately there are many poor examples around.
| return cls._instance | ||
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| if __name__ == "__main__": | ||
| obj1 = Singleton() |
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Also referring to the facade documentation lines 94-97, this repo uses doctests to establish testing.
Could you follow the same pattern to demonstrate the principle you are demonstrating here..
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This PR adds a simple implementation of the Singleton design pattern in Python. The example is placed in patterns/singleton.py and includes comments and a small test run.