What are some advanced features of Python's itertools module?
Python's itertools module provides a collection of tools for handling iterators. Some advanced features include combinations, permutations, and infinite iterators like count and cycle.
Can you explain how to use the 'combinations' function?
Sure! The 'combinations' function returns all possible combinations of a specified length from the input iterable. For example, itertools.combinations('ABCD', 2) will yield ('A', 'B'), ('A', 'C'), ('A', 'D'), etc.
What about the 'chain' function? How does it work?
The 'chain' function takes multiple iterables and returns a single iterator that produces elements from the first iterable until it is exhausted, then proceeds to the next iterable, and so on.
Are there any performance considerations when using itertools?
Yes, itertools is designed for efficiency. It generates items on-the-fly, which can save memory compared to creating large lists. However, be cautious with infinite iterators to avoid infinite loops.
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