"Conducted among over 1,200 respondents, Facebook's 2025 Typed Python Survey highlights how and why Python developers have increasingly adopted the language's type hinting system. The survey also sheds light on what developers value most, as well as their biggest frustrations and wishes. Overall, 86% of respondents reported they "always" or "often" use type hints in their code, with adoption highest among developers with 5-10 years of Python experience."
"Developers cited several benefits from adopting Python's type system, including better readability and in-code documentation, improved IDE and tooling support, early bug detection, and increased confidence. They also highlighted the value of advanced features such as protocols, generics, and the ability to inspect annotations at runtime. On the other hand, respondents identified several challenges, including limited type hinting support in third-party libraries, the complexity of advanced features like generics and decorators, and increased verbosity for complex types."
86% of developers report they always or often use type hints, with highest adoption among those with 5–10 years of Python experience. Junior (0–2 years) and very senior (10+ years) developers use type hints less frequently, at 83% and 80% respectively. Developers cite better readability, in-code documentation, improved IDE and tooling support, earlier bug detection, and greater confidence as benefits. Advanced features such as protocols, generics, and runtime inspection of annotations are valued. Challenges include limited third-party library support, complexity of generics and decorators, verbosity for complex types, and tool fragmentation. Selection bias may affect these results.
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