Data structure decision cards
Recall when to use the four everyday Python data structures.
mixed card deck comparison table battlecard callout When is a list the natural choice? When order and repeated items matter. Use lists for rows, steps, messages, and ordered outputs. When is a dictionary the natural choice? When a key should lead to a value. Examples include totals by region or users by email. Set versus list for membership checks The question decides the structure. I can do this with a list and a loop. Your line You can, but a set says uniqueness directly and removes extra loop noise. Using the first structure you remember. The response ties the choice…
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