How can I use advanced features of itertools in Python?

How can I use advanced features of itertools in Python?

You can use advanced features like groupby, combinations, and permutations to handle complex iterations.

Can you give me an example of using groupby?

Sure! Here's a simple example:

from itertools import groupby

data = [('a', 1), ('b', 2), ('a', 3), ('b', 4)]

# Group by the first element of the tuples
for key, group in groupby(data, key=lambda x: x[0]):
    print(key, list(group))

What about using combinations? How does that work?

combinations generates all possible combinations of a specified length from the input iterable. For example:

from itertools import combinations

items = ['a', 'b', 'c']
for combo in combinations(items, 2):
    print(combo)