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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_passenger_queue_stats(self):
 """ Execute passenger-stats, parse its output, returnand requests in queue """

        queue_stats = {
            "top_level_queue_size": 0.0,
            "passenger_queue_size": 0.0,
        }

        command = [self.config["passenger_status_bin"]]
        if str_to_bool(self.config["use_sudo"]):
            command.insert(0, self.config["sudo_cmd"])

        try:
            proc1 = subprocess.Popen(command, stdout=subprocess.PIPE)
            (std_out, std_err) = proc1.communicate()

        except OSError:
            return {}

        if std_out is None:
            return {}

        re_colour = re.compile("\x1B\[([0-9]{1,3}((;[0-9]{1,3})*)?)?[m|K]")
        re_requests = re.compile(r"Requests")
        re_topqueue = re.compile(r"^top-level")

        gen_info_flag = 0
        app_groups_flag = 0
        for raw_line in std_out.splitlines():
            line = re_colour.sub("", raw_line)
            if "General information" in line:
                gen_info_flag = 1
            if "Application groups" in line:
                app_groups_flag = 1
            elif re_requests.match(line) and re_topqueue.search(line):
                # If line starts with Requests and line has top-level queue then
                # store queue size
                line_splitted = line.split()
                if gen_info_flag == 1 and line_splitted:
                    queue_stats["top_level_queue_size"] = float(
                        line_splitted[5])
            elif re_requests.search(line) and not re_topqueue.search(line):
                # If line has Requests and nothing else special
                line_splitted = line.split()
                if app_groups_flag == 1 and line_splitted:
                    queue_stats["passenger_queue_size"] = float(
                        line_splitted[3])

        return queue_stats