def get_passenger_cpu_usage(self, dict_stats):
        """
        Execute % top; and return STDOUT.
        """
        try:
            proc1 = subprocess.Popen(
                ["top", "-b", "-n", "2"],
                stdout=subprocess.PIPE)
            (std_out, std_err) = proc1.communicate()
        except OSError:
            return (-1)

        re_lspaces = re.compile("^\s*")
        re_digit = re.compile("^\d")
        overall_cpu = 0
        for raw_line in std_out.splitlines():
            line = re_lspaces.sub("", raw_line)
            if not re_digit.match(line):
                continue

            line_splitted = line.split()
            if dict_stats["apache_procs"] in line_splitted[0]:
                overall_cpu += float(line_splitted[8])
            elif line_splitted[0] in dict_stats["nginx_procs"]:
                overall_cpu += float(line_splitted[8])
            elif line_splitted[0] in dict_stats["passenger_procs"]:
                overall_cpu += float(line_splitted[8])

        return overall_cpu
dataset/ETHPy150Open Yelp/fullerite/src/diamond/collectors/passenger_stats/passenger_stats.py/PassengerCollector.get_passenger_cpu_usage/swapped operands of `in`