Lesson 02 · 11 min
Lists, dicts, loops
A list is a sequence. A dict is key → value. for goes over the elements, not by index, unless you need the index.
items = ["tea", "coffee"] is a list; indexes start at zero; append adds to the end. user = {"id": 1, "name": "Ada"} is a dict. The key in quotes, a colon, the value. Access: user["name"]. No such key — KeyError. .get("name") returns None if the key is missing.
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