async def customfilter(iterable):
items = []
async for item in auto_aiter(iterable):
items.append(str(item))
if len(items) == 3:
break
return ",".join(items)
def test_async_iteration_in_templates_extended():
t = Template(
"{% for x in rng %}{{ loop.index0 }}/{{ x }}{% endfor %}", enable_async=True
)
stream = t.generate(rng=auto_aiter(range(1, 4)))
assert next(stream) == "0"
assert "".join(stream) == "/11/22/3"