Python · Dictionaries & Sets

Besides a {...} literal, what two call forms does the dict() constructor accept — and what restricts the keyword form?

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More in Dictionaries & Sets

What does this print? ``` d = {"a": 1, "a": 2} print(d) ```

Why does this raise an error? ``` d = {[1, 2]: "x"} ```

Can a tuple be a dict key but a list cannot? Why the difference?

What does this print? ``` d = {1: "x"} print(d[1.0]) ```

What does this print? ``` d = {"a": 1, "b": 2} print("a" in d) print(1 in d) ```

What does this loop print? ``` d = {"a": 1, "b": 2} for x in d: print(x) ```

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