Unpacking inside comprehensions

Learn how to use the unpacking operator inside list comprehensions. Starting with Python 3.15, you can use the asterisk * to unpack inside list comprehensions: nested = [[0, 1, 2], [3, 4], [], [5, 6, 7]] flattened = [*sublist for sublist in nested] print(flattened) # [0, 1, 2, 3, 4, 5, 6, 7] This new unpacking feature also works with set comprehensions, dictionary comprehensions, and generator expressions. This article explains the syntax, the alternatives in Python 3.14 or earlier, and shows real world example applications. 15 days of Python 3.15 To celebrate the release of Python 3.15, over the next 15 business days I'll be writing about a new 3.15 feature every day. Explained clearly and with examples so you don't have to sift through the changelog. Subscribe to receive this free email series: Enroll for free 🐍🚀 If you want, you can also check the schedule of the upcoming emails. Unpacking inside a comprehension If you have a nested list of lists, you can flatten them out by…