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Stream-Process a Large CSV
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
Write a function that reads a CSV file and sums all values in a given column. The file could be several gigabytes, so you can't load it all into memory. Handle missing or non-numeric values gracefully.
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.