tightwrap
A typed `functools.wraps`.
Decision gist · record as of 2026-08-14
Yes. If you write decorators or function wrappers and use a static type checker, this is a straightforward win: it fixes a real gap in `functools.wraps` with zero complexity, no security issues, active maintenance, and a permissive license. If you don't use type checking or don't write wrappers, you don't need it.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Low friction: pure Python wheel with only `typing-extensions` as a runtime dependency.
- Actively maintained with recent releases supporting Python 3.13 and 3.14.
License · maintenance · safety
Apache2 (permissive) — Apache 2.0 (permissive): you can use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
last release 2026-03-04 (163 days)
0 known vulnerabilities (OSV.dev, 2026-08-14) · 90,943 downloads/mo, #13,554 on PyPI
Alternatives
Verify before relying
pip install tightwrap
from tightwrap import wraps
def original(a: int) -> int:
return a + 1
@wraps(original)
def wrapper(*args, **kwargs) -> int:
return original(*args, **kwargs)- Whether the package is suitable for all decorator patterns (e.g., class decorators, async functions, partial application).
- Performance characteristics compared to `functools.wraps` for high-frequency wrapping scenarios.
What it is and what it does
tightwrap is a minimal library that solves a specific typing problem: when you use `functools.wraps` to decorate a function, static type checkers like mypy lose the original function's signature and see only `*args, **kwargs`. This breaks type safety—a caller can pass the wrong types and the checker won't catch it. tightwrap.wraps has the same runtime behavior as `functools.wraps` but preserves the wrapped function's type signature for static analysis, so type checkers correctly report signature mismatches.
The package is intentionally small and has only one runtime dependency (`typing-extensions`). It applies `functools.wraps` under the hood to maintain runtime introspection compatibility, and it handles cases where the wrapper has a different return type than the wrapped function. Recent versions add support for wrapping methods and modern Python versions (3.13, 3.14).
Use it for
- Wrapping functions in decorators while maintaining type safety for static analysis.
- Building decorator libraries where callers should see the original function's signature in their IDE and type checker.
- Ensuring runtime function metadata (name, docstring, annotations) stays accurate while preserving type hints.
- Wrapping methods in classes with correct typing for both static checkers and runtime introspection.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
If you write decorators or function wrappers and use a static type checker, this is a straightforward win: it fixes a real gap in `functools.wraps` with zero complexity, no security issues, active maintenance, and a permissive license. If you don't use type checking or don't write wrappers, you don't need it.
Install
tightwrap on PyPI
Before you install
Low friction: pure Python wheel with only `typing-extensions` as a runtime dependency. Actively maintained with recent releases supporting Python 3.13 and 3.14.
License in practice
Apache 2.0 (permissive): you can use, modify, and distribute this package freely in commercial and private projects with minimal restrictions.
Quickstart
pip install tightwrap
from tightwrap import wraps
def original(a: int) -> int:
return a + 1
@wraps(original)
def wrapper(*args, **kwargs) -> int:
return original(*args, **kwargs)Verify before relying
- Whether the package is suitable for all decorator patterns (e.g., class decorators, async functions, partial application).
- Performance characteristics compared to `functools.wraps` for high-frequency wrapping scenarios.
Package facts
| License | Apache2 permissive |
| Python support | Supports the current Python release >=3.8 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 1 packagetyping-extensions |
| Maintenance | Actively maintained 163 days since the last release |
| First released | |
| Downloads | 90,943 / month, #13,554 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Intended Audience :: DevelopersProgramming Language :: Python :: 3.10Programming Language :: Python :: 3.11Programming Language :: Python :: 3.12Programming Language :: Python :: 3.13Programming Language :: Python :: 3.14Programming Language :: Python :: Implementation :: CPythonTyping :: Typed |
Evidence: tightwrap-26.1.0-py3-none-any.whl
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See also wraps · wrapt · decopatch · singleton-decorator · django-types · undecorated · singledispatch · types-decorator · joblib-stubs · mo-kwargs