49 lines
1.0 KiB
Python
49 lines
1.0 KiB
Python
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# test waiting within "async for" aiter/anext functions
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import sys
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if sys.implementation.name == 'micropython':
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# uPy allows normal generators to be awaitables
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coroutine = lambda f: f
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else:
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import types
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coroutine = types.coroutine
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@coroutine
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def f(x):
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print('f start:', x)
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yield x + 1
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yield x + 2
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return x + 3
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class ARange:
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def __init__(self, high):
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print('init')
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self.cur = 0
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self.high = high
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async def __aiter__(self):
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print('aiter')
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print('f returned:', await f(10))
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return self
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async def __anext__(self):
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print('anext')
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print('f returned:', await f(20))
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if self.cur < self.high:
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val = self.cur
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self.cur += 1
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return val
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else:
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raise StopAsyncIteration
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async def coro():
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async for x in ARange(4):
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print('x', x)
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o = coro()
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try:
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while True:
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print('coro yielded:', o.send(None))
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except StopIteration:
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print('finished')
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