Sync Contexts¶

Since v12.0.0, the SDK is async-only. However, that doesn’t mean there is no way make sync requests as before–you’ll just have to jump through a few hoops to do so.

Blocking portals¶

anyio provides a useful tool for stringing together async calls in a sync context called a blocking portal, which runs an event loop in a dedicated thread:

from functools import partial
from anyio.from_thread import start_blocking_portal
from tastytrade import Account, Session

sesh = Session("secret", "refresh")
with start_blocking_portal() as portal:
    acc = portal.call(Account.get, sesh, "5WX01234")
    print(
        portal.call(
            # we use partial since anyio functions don't support keyword arguments
            partial(acc.get_positions, sesh, underlying_symbols=["IBIT", "AVDV"])
        )
    )

This allows you to weave together sync and async calls seamlessly in a sync context. It even works with streamers, which wasn’t possible before:

from tastytrade import DXLinkStreamer
from tastytrade.dxfeed import Quote

with start_blocking_portal() as portal:
    streamer = DXLinkStreamer(sesh)
    with portal.wrap_async_context_manager(streamer.__asynccontextmanager__()):
        portal.call(streamer.subscribe, Quote, ["SPY"])
        print(portal.call(streamer.get_event, Quote))

You can read more about this functionality in the anyio docs.