How to use 'functools reduce' in Python
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19 def reduce( 20 self, f: Callable[[B, A], B], initializer: Optional[B] = None 21 ) -> B: 22 """ 23 Aggregate elements by ``f`` 24 25 Example: 26 >>> List(range(3)).reduce(lambda a, b: a + b) 27 3 28 29 Args: 30 f: Function to perform aggregation 31 initializer: Starting value for aggregation 32 Return: 33 Aggregated result 34 """ 35 return reduce(f, self, initializer) # type: ignore