typed-errs
Small, typed Result and Option values for Python code that wants explicit
failure paths without exceptions crossing API boundaries.
uv add typed-errs
Example
from enum import Enum, auto
from typed_errs import Err, Ok, Result, catch_bubble
class ReadError(Enum):
NOT_FOUND = auto()
def read_name() -> Result[str, ReadError]:
return Ok("Veya")
@catch_bubble
def greeting() -> Result[str, ReadError]:
name = read_name().q
return Ok(f"hello {name}")
Define each application's error categories as normal Enum classes. Err
stores that enum plus an optional Diagnostic, namespace, and context message.
The package also provides Some, Nothing, Option, catch_bubble, and
catch_nothing.
Where I use it
This is my internal error-handling base for 42 projects. The generic Result,
Option, diagnostics, and bubbling helpers come from
Pacman, a
work-in-progress group project in the 42 organization.
The same pattern is used throughout
RAG Against the Machine,
call_me_maybe, and
fly-in for CLI, file parsing, storage,
indexing, watcher, and web-service failures. Projects define their own error
Enum and return Ok or Err instead of copying the implementation again.
Dependencies
No runtime dependencies. Python 3.10 or newer.
Development and release
Run mise run check for lint, type checks, tests, and a package build. Every
push to master publishes a unique 0.0.<CI run> ZeroVer version through PyPI Trusted
Publishing. mise run publish remains available for manual publishing.
1 maintainer
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