Invert a Country-Code Dict

Medium ⏱ 12 min 54% acceptance ★★★★★ 4.7

Write invert(codes) that flips a dict like {'IN': 'India'} into {'India': 'IN'} with a dict comprehension. Assume values are unique — but uppercase the new values (the codes) in the same pass.

Examples

Example 1

Input

invert({'in': 'India', 'us': 'USA'})

Output

{'India': 'IN', 'USA': 'US'}

Explanation

Keys and values swap; codes get uppercased.

Constraints

Values in the input are unique.
One dict comprehension.

Topics

List Comprehensionsdict comprehension

Companies

GoogleOracle

Hints

Hint 1

Iterate .items() and swap positions.

Hint 2

Apply .upper() to the code as it becomes the value.

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