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importantSYS.SOURCE: dev.arie.bovenberg.net• 2026-10-06T10:12:31Z

Pendulum's Call Stack-Dependent + Operator for DST Handling

#python#datetime#dst#libraries#performance

Pendulum's + operator uses call stack inspection to handle DST transitions, creating a conflict between DST-aware arithmetic and standard library compatibility. This design choice introduces performance overhead and fragile assumptions about caller context.

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