Collect interrupt data

def collect(self):
        """
        Collect interrupt data
        """
        if not os.access(self.PROC, os.R_OK):
            return False

        # Open PROC file
        file = open(self.PROC, 'r')
        # Get data
        cpuCount = None
        for line in file:
            if not cpuCount:
                cpuCount = len(line.split())
            else:
                data = line.strip().split(None, cpuCount + 2)
                data[0] = data[0].replace(':', '')

                if len(data) == 2:
                    metric_name = data[0]
                    metric_value = data[1]
                    self.publish(metric_name,
                                 self.derivative(metric_name,
                                                 long(metric_value),
                                                 counter))
                else:
                    if len(data[0]) == cpuCount + 1:
                        metric_name = data[0] + '.'
                    elif len(data[0]) == 3:
                        metric_name = (
                            ((data[-2] + ' ' +
                              data[-1]).replace(' ', '_')) + '.')
                    else:
                        metric_name = (
                            ((data[-2]).replace(' ', '_')) +
                            '.' +
                            ((data[-1]).replace(', ', '-').replace(' ', '_')) +
                            '.' + data[0] + '.')
                    total = 0
                    for index, value in enumerate(data):
                        if index == 0 or index >= cpuCount + 1:
                            continue

                        metric_name_node = metric_name + 'CPU' + str(index - 1)
                        value = int(self.derivative(metric_name_node,
                                                    long(value), counter))
                        total += value
                        self.publish(metric_name_node, value)

                    # Roll up value
                    metric_name_node = metric_name + 'total'
                    self.publish(metric_name_node, total)

        # Close file
        file.close()