fastapi

pypi package · declared by 308 of 2,343 sampled repositories · graph computed 2026-08-24

Counted from the runtime dependencies public repositories declare — not the resolved tree. A transitive dependency is a consequence; a declared one is a choice. Development dependencies are excluded because they repeat across every project in a language regardless of what is being built.

Declared with

ranked by association, not by count

Tools declared alongside this one, ranked by association strength
Declared with	Repositories	vs chance
uvicorn	214 of 2,343	0.89
python-multipart	90 of 2,343	0.65
httpx	114 of 2,343	0.50
pydantic-settings	71 of 2,343	0.50
pyjwt	39 of 2,343	0.49
pydantic	150 of 2,343	0.49
aiofiles	39 of 2,343	0.47
alembic	32 of 2,343	0.46
apscheduler	20 of 2,343	0.46
websockets	42 of 2,343	0.45
asyncpg	21 of 2,343	0.45
sqlalchemy	46 of 2,343	0.45
sse-starlette	16 of 2,343	0.43
celery	13 of 2,343	0.43
redis	31 of 2,343	0.42
bcrypt	16 of 2,343	0.42
cryptography	39 of 2,343	0.42
pypdf	23 of 2,343	0.42
prometheus-client	16 of 2,343	0.40
aiosqlite	24 of 2,343	0.40

Every pair above is counted from the same evidence: repo manifest.

Used instead

candidates · shares a neighbourhood and refuses to co-occur

No alternative measured. A pair qualifies only if it shares a neighbourhood and then fails to appear together against an expectation that it would — and almost everything that shares a neighbourhood does appear together. That is the test working, not a gap in the data: similarity alone would list this tool’s closest neighbours as alternatives, and most of them are things it is used with.