def from_protobuf(message: NumbersMessage):
"""
Load from a protobuf message
Returns
-------
number_tracker : NumberTracker
"""
theta = None
if message.theta is not None and len(message.theta) > 0:
theta = ThetaSketch.deserialize(message.theta)
elif message.compact_theta is not None and len(message.compact_theta) > 0:
theta = ThetaSketch.deserialize(message.compact_theta)
opts = dict(
theta_sketch=theta,
variance=VarianceTracker.from_protobuf(message.variance),
histogram=dsketch.deserialize_kll_floats_sketch(message.histogram),
frequent_numbers=dsketch.FrequentNumbersSketch.from_protobuf(
message.frequent_numbers
),
)
if message.HasField("doubles"):
opts["floats"] = FloatTracker.from_protobuf(message.doubles)
if message.HasField("longs"):
opts["ints"] = IntTracker.from_protobuf(message.longs)
return NumberTracker(**opts)
def from_protobuf(message: NumbersMessage):
"""
Load from a protobuf message
Returns
-------
number_tracker : NumberTracker
"""
theta = None
if message.compact_theta is not None and len(
message.compact_theta) > 0:
theta = ThetaSketch.deserialize(message.compact_theta)
elif message.theta is not None and len(message.theta) > 0:
logger.warning(
"Possible missing data. Non-compact theta sketches are no longer supported"
)
opts = dict(
theta_sketch=theta,
variance=VarianceTracker.from_protobuf(message.variance),
histogram=dsketch.deserialize_kll_floats_sketch(message.histogram),
)
if message.HasField("doubles"):
opts["floats"] = FloatTracker.from_protobuf(message.doubles)
if message.HasField("longs"):
opts["ints"] = IntTracker.from_protobuf(message.longs)
return NumberTracker(**opts)
def test_deserialize_full_hist_returns_sketch():
x = dsketch.deserialize_kll_floats_sketch(FULL_HIST_BYTES)
assert isinstance(
x, (datasketches.kll_floats_sketch, datasketches.kll_ints_sketch))
assert x.get_n() == 100
def test_deserialize_empty_hist_returns_none():
x = dsketch.deserialize_kll_floats_sketch(EMPTY_HIST_BYTES)
assert x is None