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The Field Counter
A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- easy
- Seniority
- mid, senior
Problem
Write a function that takes a list of dicts and a key name. Return a dict mapping each distinct value found at that key to the number of records that have that value. Records missing the key should be ignored.
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.