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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def patch(self, overrides):
 """ Patches the config with the given overrides. Example: If the current dictionary looks like this: a: 1, b: { c: 3, d: 4 } and `patch` is called with the following overrides: b: { d: 2, e: 4 }, c: 5 then, the following will be the resulting dictionary: a: 1, b: { c: 3, d: 2, e: 4 }, c: 5 """

        overrides = overrides or {}
        for key, value in iteritems(overrides):
            current = self.get(key)
            if isinstance(value, dict) and isinstance(current, dict):
                current.patch(value)
            else:
                self[key] = value