How do I use itertools combinations in Python?

How do I use itertools combinations in Python?

You can use the combinations function from the itertools module to generate all possible combinations of a specified length from an iterable.

Can you show me a code example?

Sure! Here's a simple example:

import itertools

items = ['A', 'B', 'C']
combinations = itertools.combinations(items, 2)
for combo in combinations:
    print(combo)

This will output:

('A', 'B')
('A', 'C')
('B', 'C')

What if I want combinations of length 3?

You can specify the length as the second argument in the combinations function:

combinations = itertools.combinations(items, 3)

This will give you all combinations of length 3.

Are there any limitations to using combinations?

Yes, the number of combinations can grow quickly with larger iterables and lengths, so be mindful of memory usage.