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

Domain

Python

Difficulty

hard

Seniority

L6

Problem

Given a task dict mapping task names to {'deps': [dep_names], 'func': lambda_source_string}, topologically order the tasks. For each task, evaluate its lambda by passing a dict {dep_name: result_of_dep} as 'inputs'. Return a dict of task_name -> result. Raise an exception if a cycle exists.

Summary

Wire up a mini pipeline and watch it run.

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