itertools

Iterator utilities for data processing and stream merging.

Provides specialized iterator functions for merging sorted streams, grouping operations, and validation checks commonly needed in time series data processing and forecasting workflows.

Functions

groupby(iterable)	Group items by a key function.
is_all_same(items)	Check that all items have the same value.
merge_iterators(it1, it2, compare)	Yield items from two sorted iterators in order defined by compare(a, b).