Explain object creation.
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What is the difference between __new__ and __init__?
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newinit
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new actually creates and returns the instance (rarely overridden, e.g. for immutables or singletons); init initializes the already-created instance. __new__ runs first; __init__ runs only if __new__ returns an instance of the class.
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PY__new__ runs first; using it for a singleton
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