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The One-Timers
A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- easy
- Seniority
- mid
Problem
Our feature store deduplication step needs to identify singleton values. Write a function called unique_values that takes a dictionary and returns a sorted list of values that occur exactly once across all entries.
Practice This Problem
Solve this Python problem with real code execution. DataDriven runs your Python code in a sandboxed Docker environment and grades it instantly.