Python: what is the difference between __str__ and __repr__?

Question

When should I implement __repr__ and when __str__?

Priya Raghunathan · Accepted Answer

__repr__ is for developers: unambiguous, ideally valid Python that recreates the object. Used by the REPL, repr(), and containers.
__str__ is for users: readable. Used by print() and str(); falls back to __repr__ if missing.
Always implement __repr__; add __str__ only when a friendlier form helps.

Python: what is the difference between str and repr?

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