Into One Stream

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

Domain

Python

Difficulty

easy

Seniority

L5

Problem

A log collector hands you a buffer where each slot is either a single event id or a batch of ids grouped in a nested list. Return every id from `items` in one flat list, keeping their left-to-right order.

Summary

Some arrive alone, some in batches. Line them all up.

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Solve this Python problem with real code execution. DataDriven runs your Python code in a real environment and grades it automatically.