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import itertools
from typing import Iterable, TypeVar
_T = TypeVar("_T")
def batched(iterable: Iterable[_T], n: int) -> Iterable[list[_T]]:
"Batch data into tuples of length n. The last batch may be shorter."
# batched('ABCDEFG', 3) --> ABC DEF G
if n < 1:
raise ValueError("n must be at least one")
it = iter(iterable)
while batch := list(itertools.islice(it, n)):
yield batch
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