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The Schema Migrator
A hard Python interview practice problem on DataDriven. Write and execute real python code with instant grading.
- Domain
- Python
- Difficulty
- hard
- Seniority
- senior, staff
Problem
The data lake has thousands of records stuck in an old schema, and a batch migration needs to reshape them all according to a list of field-level operations. Write a function that applies rename, add, remove, and type-cast operations to records, supporting nested fields via dot notation.
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