Starlette Problems

style tests

starlette_problem is a set of exceptions and handlers for use in starlette applications to support easy error management and responses.

Each exception easily marshals to JSON based on the RFC9457 spec for use in api errors.

Check the docs for more details.

Custom Errors

Subclassing the convenience classes provide a simple way to consistently raise the same error with detail/extras changing based on the raised context.

from starlette_problem.error import NotFoundProblem


class UserNotFoundError(NotFoundProblem):
    title = "User not found."

raise UserNotFoundError(detail="detail")

{
    "type": "user-not-found",
    "title": "User not found",
    "detail": "detail",
    "status": 404,
}

Usage

import starlette.applications
from starlette_problem.handler import add_exception_handler


app = starlette.applications.Starlette()
add_exception_handler(app)

@app.get("/user")
async def get_user():
    raise UserNotFoundError("No user found.")

$ curl localhost:8000/user
{

    "type": "user-not-found",
    "title": "User not found",
    "detail": "No user found.",
    "status": 404,
}

Metadata

Release files for starlette-problem 0.13.5

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for starlette-problem 0.13.5
File	Size	Uploaded
starlette_problem-0.13.5.tar.gz	83.1 kB	Feb 10, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for starlette-problem 0.13.5
File	Interpreter	ABI	Platform	Reset
starlette_problem-0.13.5-py3-none-any.whl 11.7 kB Feb 10, 2026	Python 3	none	any	Details

Total release size: 94.7 kB

Release files / starlette_problem-0.13.5.tar.gz

Download URL	starlette_problem-0.13.5.tar.gz
Size	83.1 kB
Tags	Source
SHA-256 checksum How to use checksums	`f7839f1692971b0de77ee04c9df1c02afff841e8f47abea7f2ef54359ef2408e`
BLAKE2b-256 checksum How to use checksums	`89e0fa662f593314824e5a62b57e929e60b42050b53646c2a21bf93f9894e643`
Upload date	Feb 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.9.25`

Release files / starlette_problem-0.13.5-py3-none-any.whl

Download URL	starlette_problem-0.13.5-py3-none-any.whl
Size	11.7 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`3fa1f19141ac675dcbcefd1871bd52beeccf7c3375ce162931f6a82fd8707b70`
BLAKE2b-256 checksum How to use checksums	`becce36cf52424ea3142e7b38de6ce3fe416f63173d2e18325cb1e682dda21f6`
Upload date	Feb 10, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/6.2.0 CPython/3.9.25`