Source code for paco.until

# -*- coding: utf-8 -*-
import asyncio
from .whilst import whilst

[docs]@asyncio.coroutine def until(coro, coro_test, assert_coro=None, *args, **kw): """ Repeatedly call `coro` coroutine function until `coro_test` returns `True`. This function is the inverse of `paco.whilst()`. This function is a coroutine. Arguments: coro (coroutinefunction): coroutine function to execute. coro_test (coroutinefunction): coroutine function to test. assert_coro (coroutinefunction): optional assertion coroutine used to determine if the test passed or not. *args (mixed): optional variadic arguments to pass to `coro` function. Raises: TypeError: if input arguments are invalid. Returns: list: result values returned by `coro`. Usage:: calls = 0 async def task(): nonlocal calls calls += 1 return calls async def calls_gt_4(): return calls > 4 await paco.until(task, calls_gt_4) # => [1, 2, 3, 4, 5] """ @asyncio.coroutine def assert_coro(value): return not value return (yield from whilst(coro, coro_test, assert_coro=assert_coro, *args, **kw))