The Double-Ended Gateway

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

Domain

Python

Difficulty

medium

Seniority

L4

Problem

Implement MyDeque with push_front, push_back, pop_front, pop_back, peek_front, peek_back, is_empty. Do NOT use collections.deque. Test harness: ['MyDeque', args] then op sequences; returns parallel list (None for constructor/mutators, value for peek/pop, True/False for is_empty).

Summary

Some queues let you skip the line from both ends.

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