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How to use _decode_stat_data method in yandex-tank

Best Python code snippet using yandex-tank

reader.py

Source:reader.py

...73        self.stat_buffer = ""74        self.stat_filename = filename75        self.closed = False76        self.start_time = 077    def _decode_stat_data(self, chunk):78        """79        Return all items found in this chunk80        """81        for date_str, statistics in chunk.iteritems():82            date_obj = datetime.datetime.strptime(83                date_str.split(".")[0], '%Y-%m-%d %H:%M:%S')84            chunk_date = int(time.mktime(date_obj.timetuple()))85            instances = 086            for benchmark_name, benchmark in statistics.iteritems():87                if not benchmark_name.startswith("benchmark_io"):88                    continue89                for method, meth_obj in benchmark.iteritems():90                    if "mmtasks" in meth_obj:91                        instances += meth_obj["mmtasks"][2]92            offset = chunk_date - 1 - self.start_time93            reqps = 094            if offset >= 0 and offset < len(self.phantom_info.steps):95                reqps = self.phantom_info.steps[offset][0]96            yield {97                'ts': chunk_date - 1,98                'metrics': {99                    'instances': instances,100                    'reqps': reqps101                }102            }103    def _read_stat_data(self, stat_file):104        chunk = stat_file.read(1024 * 1024 * 50)105        if chunk:106            self.stat_buffer += chunk107            parts = self.stat_buffer.rsplit('\n},', 1)108            if len(parts) > 1:109                ready_chunk = parts[0]110                self.stat_buffer = parts[1]111                chunks = [112                    json.loads('{%s}}' % s) for s in ready_chunk.split('\n},')113                ]114                return list(115                    itt.chain(116                        *(self._decode_stat_data(chunk) for chunk in chunks)))117        else:118            self.stat_buffer += stat_file.readline()119    def __iter__(self):120        """121        Union buffer and chunk, split using '\n},',122        return splitted parts123        """124        self.start_time = int(time.time())125        with open(self.stat_filename, 'r') as stat_file:126            while not self.closed:127                yield self._read_stat_data(stat_file)128            yield self._read_stat_data(stat_file)129    def close(self):130        self.closed = True

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