A hard Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

hard

Seniority

L5

Problem

Given a CSV file path and column name, stream the file line-by-line (do not load all into memory) and return the sum of numeric values in that column. Skip rows whose column value is missing or not numeric. Return a float. ('check_manually' signals the grader to run functional validation.)

Summary

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