def rows(self):
"""
Returns a materialized list of tuples where each tuple contains the
points from each stream at a unique time. If a stream has no value for that
time than None is provided instead of a point object.
Parameters
----------
None
Returns
-------
list
A list of tuples containing a RawPoint (or StatPoint) and the stream
version (list(tuple(RawPoint, int))).
"""
result = []
streamset_data = self._streamset_data(as_iterators=True)
buffer = PointBuffer(len(self._streams))
while True:
streams_empty = True
# add next values from streams into buffer
for stream_idx, data in enumerate(streamset_data):
if buffer.active[stream_idx]:
try:
point, _ = next(data)
buffer.add_point(stream_idx, point)
streams_empty = False
except StopIteration:
buffer.deactivate(stream_idx)
continue
key = buffer.next_key_ready()
if key:
result.append(tuple(buffer.pop(key)))
if streams_empty and len(buffer.keys()) == 0:
break
return result
def test_next_key_ready_if_none_are(self):
"""
Assert next_key_ready returns None if nothing is ready
"""
buffer = PointBuffer(3)
assert buffer.next_key_ready() == None
buffer.add_point(0, RawPoint(time=1000, value="leopard"))
buffer.add_point(2, RawPoint(time=1000, value="giraffe"))
buffer.add_point(0, RawPoint(time=2000, value="horse"))
buffer.add_point(0, RawPoint(time=3000, value="pig"))
assert buffer.next_key_ready() == None
def test_next_key_ready_with_inactive(self):
"""
Assert next_key_ready returns correct key with inactive stream
"""
buffer = PointBuffer(3)
buffer.deactivate(1)
buffer.add_point(0, RawPoint(time=1000, value="leopard"))
buffer.add_point(2, RawPoint(time=1000, value="leopard"))
buffer.add_point(0, RawPoint(time=2000, value="leopard"))
assert buffer.next_key_ready() == 1000
# assert first key is 500 even though it was exhausted
buffer = PointBuffer(3)
buffer.add_point(1, RawPoint(time=500, value="leopard"))
buffer.deactivate(1)
buffer.add_point(0, RawPoint(time=1000, value="leopard"))
buffer.add_point(2, RawPoint(time=1000, value="leopard"))
assert buffer.next_key_ready() == 500
def test_is_ready(self):
"""
Assert is_ready returns correct value
"""
buffer = PointBuffer(2)
buffer.add_point(0, RawPoint(time=1000, value="zebra"))
buffer.add_point(1, RawPoint(time=1000, value="giraffe"))
buffer.add_point(0, RawPoint(time=2000, value="horse"))
assert buffer.is_ready(1000) == True
assert buffer.is_ready(2000) == False
buffer.deactivate(1)
assert buffer.is_ready(2000) == True
def test_next_key_ready(self):
"""
Assert next_key_ready returns correct key
"""
buffer = PointBuffer(3)
buffer.add_point(0, RawPoint(time=1000, value="zebra"))
buffer.add_point(1, RawPoint(time=1000, value="leopard"))
buffer.add_point(2, RawPoint(time=1000, value="giraffe"))
buffer.add_point(0, RawPoint(time=2000, value="horse"))
buffer.add_point(0, RawPoint(time=3000, value="pig"))
assert buffer.next_key_ready() == 1000
buffer = PointBuffer(2)
buffer.add_point(0, RawPoint(time=1000, value="horse"))
buffer.add_point(0, RawPoint(time=2000, value="zebra"))
buffer.add_point(0, RawPoint(time=3000, value="pig"))
buffer.add_point(1, RawPoint(time=2000, value="leopard"))
assert buffer.next_key_ready() == 1000