This One's Yours — Lists

A list is just a list. Until you know what to do with it.

append() until it's full. pop() when you're done with something. sort() when order matters. copy() before you break the original.

index by index. slice by slice. loop by loop.

Shopping lists that update. Grade books that calculate. Functions that filter. Nested structures that hold entire worlds inside a single variable.

That's not syntax. That's thinking in lists.

This medal exists because finishing something matters. Because progress deserves to be tangible. Because "I completed the Lists chapter" should feel like more than a checkbox.

Download the file. Print it. Put it next to the others.

You started. You stayed. You finished.

A list remembers everything you put in it — in order, exactly as you left it.

So does the work you just did.

Dictionaries are next. Same discipline. Different structure. And this time — every value has a name.