hyperstream/tools/percentiles_from_list/2017-07-18_v0.0.1.py
# The MIT License (MIT) # Copyright (c) 2014-2017 University of Bristol
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from hyperstream.stream import StreamInstance
from hyperstream.tool import Tool, check_input_stream_count
from hyperstream.utils import percentile
class PercentilesFromList(Tool):
"""
For each document assumed to be a list of numbers, calculate the quantiles
"""
def __init__(self, n_segments=100, percentiles=None):
super(PercentilesFromList, self).__init__(n_segments=n_segments, percentiles=percentiles)
@check_input_stream_count(1)
def _execute(self, sources, alignment_stream, interval):
if self.percentiles is not None:
percentiles = self.percentiles
else:
percentiles = [i * 100.0 / self.n_segments for i in range(self.n_segments + 1)]
for t, d in sources[0].window(interval, force_calculation=True):
yield StreamInstance(t, percentile(d, percentiles))