Toward a Corpus Study of the Dynamic Gradual Type

March 11, 2025 Β· Declared Dead Β· πŸ› arXiv.org

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Authors Dibri Nsofor, Ben Greenman arXiv ID 2503.08928 Category cs.PL: Programming Languages Cross-listed cs.HC, cs.SE Citations 0 Venue arXiv.org Last Checked 4 months ago
Abstract
Gradually-typed languages feature a dynamic type that supports implicit coercions, greatly weakening the type system but making types easier to adopt. Understanding how developers use this dynamic type is a critical question for the design of useful and usable type systems. This paper reports on an in-progress corpus study of the dynamic type in Python, targeting 221 GitHub projects that use the mypy type checker. The study reveals eight patterns-of-use for the dynamic type, which have implications for future refinements of the mypy type system and for tool support to encourage precise type annotations.
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