Annotating an instance variable is the same as annotating a variable, except that you have to put the code in the class body.
Complete code following the instructions, so that lines followed by
# expect-type-error (if any) fail type check, while others can pass.
Hit the "▶️ Run" button to see result.
Annotating an instance variable is the same as annotating a variable, except that you have to put the code in the class body.
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