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

L5

Problem

Given an iterable of CSV lines (each line a string, no trailing newline) and a column name, stream the iterable lazily and return the sum of numeric values in that column. The first line is the header. Skip rows whose target-column value is missing or not numeric. Return a float. Process row-by-row without materializing the whole iterable in memory.

Summary

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