The Lazy Stream

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

Implement a generator class that accepts another iterable and yields its elements one at a time. Then implement a second class that wraps the first and lazily flattens one level of nesting - if a yielded element is itself iterable (but not a string), yield its elements individually. Demonstrate with a test sequence.

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