The Cipher Wheel

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

Domain

Python

Difficulty

easy

Seniority

L3

Problem

Your team's data masking tool swaps characters according to a per-tenant config. Given a plaintext string `text` and a `mapping` from characters to their replacements, return the masked string, leaving any character that has no entry in `mapping` untouched.

Summary

Every letter has an alias - you just need the right codebook.

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