+
+
+def classify_anomalies(data):
+ """Process the data and return anomalies and trending values.
+
+ Gather data into groups with average as trend value.
+ Decorate values within groups to be normal,
+ the first value of changed average as a regression, or a progression.
+
+ :param data: Full data set with unavailable samples replaced by nan.
+ :type data: OrderedDict
+ :returns: Classification and trend values
+ :rtype: 2-tuple, list of strings and list of floats
+ """
+ # Nan mean something went wrong.
+ # Use 0.0 to cause that being reported as a severe regression.
+ bare_data = [0.0 if np.isnan(sample.avg) else sample
+ for _, sample in data.iteritems()]
+ # TODO: Put analogous iterator into jumpavg library.
+ groups = BitCountingClassifier().classify(bare_data)
+ groups.reverse() # Just to use .pop() for FIFO.
+ classification = []
+ avgs = []
+ active_group = None
+ values_left = 0
+ avg = 0.0
+ for _, sample in data.iteritems():
+ if np.isnan(sample.avg):
+ classification.append("outlier")
+ avgs.append(sample.avg)
+ continue
+ if values_left < 1 or active_group is None:
+ values_left = 0
+ while values_left < 1: # Ignore empty groups (should not happen).
+ active_group = groups.pop()
+ values_left = len(active_group.values)
+ avg = active_group.metadata.avg
+ classification.append(active_group.metadata.classification)
+ avgs.append(avg)
+ values_left -= 1
+ continue
+ classification.append("normal")
+ avgs.append(avg)
+ values_left -= 1
+ return classification, avgs
+
+
+def convert_csv_to_pretty_txt(csv_file, txt_file):
+ """Convert the given csv table to pretty text table.
+
+ :param csv_file: The path to the input csv file.
+ :param txt_file: The path to the output pretty text file.
+ :type csv_file: str
+ :type txt_file: str
+ """
+
+ txt_table = None
+ with open(csv_file, 'rb') as csv_file:
+ csv_content = csv.reader(csv_file, delimiter=',', quotechar='"')
+ for row in csv_content:
+ if txt_table is None:
+ txt_table = prettytable.PrettyTable(row)
+ else:
+ txt_table.add_row(row)
+ txt_table.align["Test case"] = "l"
+ if txt_table:
+ with open(txt_file, "w") as txt_file:
+ txt_file.write(str(txt_table))
+
+
+class Worker(multiprocessing.Process):
+ """Worker class used to process tasks in separate parallel processes.
+ """
+
+ def __init__(self, work_queue, data_queue, func):
+ """Initialization.
+
+ :param work_queue: Queue with items to process.
+ :param data_queue: Shared memory between processes. Queue which keeps
+ the result data. This data is then read by the main process and used
+ in further processing.
+ :param func: Function which is executed by the worker.
+ :type work_queue: multiprocessing.JoinableQueue
+ :type data_queue: multiprocessing.Manager().Queue()
+ :type func: Callable object
+ """
+ super(Worker, self).__init__()
+ self._work_queue = work_queue
+ self._data_queue = data_queue
+ self._func = func
+
+ def run(self):
+ """Method representing the process's activity.
+ """
+
+ while True:
+ try:
+ self.process(self._work_queue.get())
+ finally:
+ self._work_queue.task_done()
+
+ def process(self, item_to_process):
+ """Method executed by the runner.
+
+ :param item_to_process: Data to be processed by the function.
+ :type item_to_process: tuple
+ """
+ self._func(self.pid, self._data_queue, *item_to_process)