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#!/usr/bin/env python2.7
from __future__ import print_function
import struct
import sys
import numpy
class Analyzer:
"""
The binary format is
time since the beginning of the measurement : double
unknown and irrelevant field : double
momentary consumption calculated for the current time segment : double
"""
def __init__(self):
self.duration = 0.0
self.consumption = []
self.mean = 0.0
self.std = 0.0
self.avg = 0.0
self.averages = []
def read_file(self, file_path):
binary = bytearray()
with open(file_path, "r") as f:
binary = bytearray(f.read())
for i in range(0, len(binary) - 24, 24):
res = struct.unpack(">ddd", binary[i:i+24])
current_duration = res[0]
if not current_duration > self.duration:
print("Unexpected elapsed time value, lower than the previous one.")
exit(2) # this should never happen because the file is written sequentially
current_consumption = res[2]
self.averages.append(current_consumption / (current_duration - self.duration))
self.duration = current_duration
self.consumption.append(current_consumption)
self.calculate_stats()
def calculate_stats(self):
self.mean = numpy.mean(self.averages)
self.std = numpy.std(self.averages)
self.avg = sum(self.consumption) / self.duration
if __name__ == "__main__":
for file_path in sys.argv[1:]:
analyzer = Analyzer()
analyzer.read_file(file_path)
print("{}\n\tavg: {}\n\tmean: {}\n\tstd: {}".format(file_path, analyzer.avg, analyzer.mean, analyzer.std))
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