cosplay2py

Unofficial typed sync and async client for the Cosplay2.ru API, built on httpx2 and Pydantic.

Installing

The package is not on PyPI. Install it from a release tag:

uv add "cosplay2py @ git+https://github.com/Arutemu64/cosplay2py" --tag v0.2.0

Versions follow SemVer. On 0.x, a minor bump (0.1 → 0.2) may break things and a patch bump never does. See CHANGELOG.md.

Authentication

API tokens are issued per event: on the event site open Орги → Настройка → API токены and create a token. You get an API key and an API secret (the secret is shown once; tokens expire after 30 days). The client sends them as X-API-Key / X-API-Secret.

Usage

from cosplay2py import Cosplay2
from cosplay2py.models import BlankId, RequestStatus

with Cosplay2(subdomain="ff26summer", api_key="...", api_secret="...") as c2:
    event = c2.events.get_settings()
    print(event.title, event.timezone)

    for topic in c2.topics.get_list():
        listing = c2.topics.get_requests(topic.url_code)
        approved = [r for r in listing.requests if r.status is RequestStatus.APPROVED]
        print(topic.title, len(approved))

    details = c2.requests.get(687475)
    print(details.values_by_field())

    jury_sheet = c2.events.get_blank(BlankId.JURY).html

Async (asyncio or trio):

from cosplay2py import AsyncCosplay2

async with AsyncCosplay2(subdomain="ff26summer") as c2:
    state = await c2.events.get_state()
    print(state.requests_total)

Events on a custom domain: Cosplay2(base_url="https://fancom.info", ...).

Any argument left out falls back to the environment: COSPLAY2_API_KEY, COSPLAY2_API_SECRET, COSPLAY2_BASE_URL.

Resources

Data conventions

• Server timestamps become timezone-aware UTC datetimes, whether the API sent "YYYY-MM-DD HH:MM:SS", Unix seconds or Unix milliseconds.
• Display strings like "22.08.26 03:00" (TopicState, Event.start_time) become naive datetimes, as the site shows them.
• 0/1 flags become bool. JSON packed into strings (Event.design, the plan) is parsed.
• Closed domain sets (RequestStatus, TopicFieldType, PageType, PlanNodeType, EventRole, EventStatus, EventTime, TopicCategory, PublicRequests, TopicTemplate, SectionTemplate, FieldTemplate, FeedbackMark, CardField, TicketKind, TicketCreateMode, VotingType, BlankId, Deadline) are validated strictly as StrEnum / IntEnum members (empty strings on optional fields normalize to None).
• Unknown fields are kept rather than rejected. Read them via model.model_extra.

Talking to the API without this library? docs/api-notes.md describes its endpoints, wire formats and quirks.

Errors

Cosplay2Error
└── APIError
    ├── APIConnectionError
    │   └── APITimeoutError
    ├── APIResponseValidationError   # 2xx, but not the expected JSON
    └── APIStatusError               # non-2xx; .status_code, .body, .response
        ├── BadRequestError (400)
        ├── AuthenticationError (401)
        ├── PermissionDeniedError (403)
        ├── NotFoundError (404)
        ├── RateLimitError (429)
        └── InternalServerError (5xx)

Repeatable reads retry transport failures and 429/502/503/504 responses, with exponential backoff and jitter (2 retries by default, configurable with max_retries). Writes retry only connection failures (ConnectError), never HTTP responses or read/write timeouts. An ambiguous failure may mean a write succeeded; check the service before repeating it yourself.

Retry-After supports seconds and HTTP dates. If the server asks for more than 30 seconds, the error is returned immediately instead of retrying early. Error messages omit response bodies and validation inputs. Inspect .response or .body explicitly when debugging; these can contain personal data.

Customizing HTTP

Pass timeout= (seconds or httpx2.Timeout), extra headers=, or a fully configured http_client=httpx2.Client(...) / httpx2.AsyncClient(...) for proxies, custom transports or testing with httpx2.MockTransport. A client you pass in is not closed by the wrapper. Its timeout and default headers apply; wrapper headers override matching defaults, and redirects are always disabled. timeout= applies only to a client created by the wrapper. Timeouts limit network phases, not the total time across retries. Use HTTPS for event credentials; HTTP is supported for local testing. Base URLs cannot contain userinfo, query strings or fragments.

This client follows observed site behavior, which can change without notice. Enable logging.getLogger("cosplay2py") at DEBUG to see requests.

Development

See CONTRIBUTING.md for how to propose changes.

uv sync
uv run prek install           # install Git hooks once per clone
uv run pytest                 # offline unit tests (default)
uv run prek run --all-files    # lint, format, and type-check

Testing against the real site

tests/live holds read-only smoke tests that are deselected by default. They need a token for the event (PowerShell shown):

$env:COSPLAY2_API_KEY = "..."
$env:COSPLAY2_API_SECRET = "..."
$env:COSPLAY2_BASE_URL = "https://ff26summer.cosplay2.ru"
uv run pytest -m live -rw

-rw lists warnings: fields the API returns that the models don't declare yet show up as UnknownFieldsWarning, an early sign of API drift.

Portal reads work with the configured event base URL (verified with event API credentials); https://cosplay2.ru returned HTTP 403 with those credentials. Methods: events.filter_list(), events.get_types(), events.create_festival(), events.create_festival_logo(), users.ratings_global() and the country/area/region/city variants, users.get_region_geo_id(), and geo.code_city(). Unobserved response shapes are returned as JSON data.