async def main():
in_ch = c.to_chan(range(4))
with self.assertRaises(TypeError):
c.transduce(
xf.filter(lambda x: x % 2 == 0),
xf.multi_arity(None, xf.identity, lambda x, y: x + y),
in_ch)
async def main():
in_ch = c.to_chan(range(4))
result_ch = c.transduce(
xf.filter(lambda x: x % 2 == 0),
xf.multi_arity(lambda: 100, xf.identity, lambda x, y: x + y),
in_ch)
self.assertEqual(await result_ch.get(), 102)
def test_xform_filter(self):
ch = c.promise_chan(xf.filter(lambda x: x > 0))
self.assertIs(ch.b_put(-1), True)
self.assertIs(ch.b_put(1), True)
self.assertIs(ch.b_put(2), True)
self.assertEqual(ch.b_get(), 1)
self.assertEqual(ch.b_get(), 1)
def test_itransduce_init_only(self):
result = xf.itransduce(xf.filter(None), xf.identity, 1, [])
self.assertEqual(result, 1)
async def main():
ch = self.chan(1, xf.filter(lambda x: x % 2 == 0))
c.onto_chan(ch, [0, 1, 2])
self.assertEqual(await a_list(ch), [0, 2])
def test_itransduce_empty_no_init(self):
result = xf.itransduce(xf.filter(lambda x: x % 2 == 0), sum_rf, [])
self.assertEqual(result, 0)
def test_itransduce_empty_no_init_no_arity_zero(self):
with self.assertRaises(TypeError):
xf.itransduce(xf.filter(lambda x: x % 2 == 0),
lambda x, y: x + y,
[])
def test_itransduce_some(self):
result = xf.itransduce(xf.filter(lambda x: x % 2 == 0),
sum_rf,
1,
[2, 3, 8])
self.assertEqual(result, 11)
def test_itransduce_some_no_init(self):
result = xf.itransduce(xf.filter(lambda x: x % 2 == 0),
sum_rf,
[1, 2, 3, 8])
self.assertEqual(result, 10)
def test_complete(self):
xform = xf.comp(xf.filter(lambda x: x % 2 == 0), xf.partition_all(2))
self.assertEqual(list(xf.xiter(xform, [2, 4, 5, 6])), [(2, 4), (6,)])
def test_arity_zero(self):
self.assertEqual(xf.filter(None)(lambda: 'success')(), 'success')
def test_reduced(self):
xform = xf.comp(xf.filter(lambda x: x % 2 == 0), xf.take(2))
self.assertEqual(list(xf.xiter(xform, [1, 2, 3, 4, 5, 6])), [2, 4])
def test_filter_none(self):
xform = xf.filter(lambda x: x % 2 == 0)
self.assertEqual(list(xf.xiter(xform, [])), [])
def test_filter_some(self):
xform = xf.filter(lambda x: x % 2 == 0)
self.assertEqual(list(xf.xiter(xform, [1, 2, 3, 4])), [2, 4])