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trio-sync-call (TRIO105)#

Derived from the flake8-trio linter.

Fix is sometimes available.

What it does#

Checks for calls to trio functions that are not immediately awaited.

Why is this bad?#

Many of the functions exposed by trio are asynchronous, and must be awaited to take effect. Calling a trio function without an await can lead to RuntimeWarning diagnostics and unexpected behaviour.


async def double_sleep(x):
    trio.sleep(2 * x)

Use instead:

async def double_sleep(x):
    await trio.sleep(2 * x)

Fix safety#

This rule's fix is marked as unsafe, as adding an await to a function call changes its semantics and runtime behavior.