Python Trick: Using itertools.accumulate for Running Totals and More

Опубликовано: 23 Март 2026
на канале: Developer Service
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The itertools.accumulate function returns accumulated sums, or any other binary function, over an iterable. By default, it computes the sum, but you can provide a different function for other types of accumulation.

How It Works:
accumulate(numbers) computes the running total of the list numbers.
accumulate(numbers, operator.mul) computes the cumulative product of the list numbers using the operator.mul function.

Why It's Cool:
Versatility: Can compute accumulated results using any binary function, not just addition.
Efficiency: Provides a memory-efficient way to compute running totals or other accumulations.
Simplicity: Simplifies the code needed for such operations, making it more readable and maintainable.

This trick is particularly useful for tasks involving running totals, cumulative statistics, and other similar operations.

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