- A union type can be created using the
|operator, e.g:X | Y Nonecan be used for typing directly- Type hint doesn't simply make an argument "optional", that's the default value's job
Complete code following the instructions, so that lines followed by
# expect-type-error (if any) fail type check, while others can pass.
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| operator, e.g: X | YNone can be used for typing directlyStuck? Check out solution