How to use devlib - 10 common examples

gem5_logger.debug("gem5_shell output: {}".format(output))

        # We get a second prompt. Hence, we need to eat one to make sure that we
        # stay in sync. If we do not do this, we risk getting out of sync for
        # slower simulations.
        self.conn.expect([self.conn.UNIQUE_PROMPT, self.conn.PROMPT], timeout=self.default_timeout)

        if check_exit_code:
            exit_code_text = self._gem5_shell('echo $?', as_root=as_root,
                                             timeout=timeout, check_exit_code=False,
                                             sync=False)
            try:
                exit_code = int(exit_code_text.split()[0])
                if exit_code:
                    message = 'Got exit code {}\nfrom: {}\nOUTPUT: {}'
                    raise TargetStableError(message.format(exit_code, command, output))
            except (ValueError, IndexError):
                gem5_logger.warning('Could not get exit code for "{}",\ngot: "{}"'.format(command, exit_code_text))

        return output

def get_mapping(base_dir, partition_file):
    mapping = {}
    with open(partition_file) as pf:
        for line in pf:
            pair = line.split()
            if len(pair) != 2:
                HostError('partitions.txt is not properly formated')
            image_path = os.path.join(base_dir, pair[1])
            if not os.path.isfile(expand_path(image_path)):
                HostError('file {} was not found in the bundle or was misplaced'.format(pair[1]))
            mapping[pair[0]] = image_path
    return mapping

    @memoized
    def android_id(self):
        """
        Get the device's ANDROID_ID. Which is

            "A 64-bit number (as a hex string) that is randomly generated when the user
            first sets up the device and should remain constant for the lifetime of the
            user's device."

        .. note:: This will get reset on userdata erasure.

        """
        output = self.execute('content query --uri content://settings/secure --projection value --where "name=\'android_id\'"').strip()
        return output.split('value=')[-1]

    @memoized
    def get_cpu_features(self, cpuid=0):
        global_features = []
        for section in self.sections:
            if 'processor' in section:
                if int(section.get('processor')) != cpuid:
                    continue
                if 'Features' in section:
                    return section.get('Features').split()
                elif 'flags' in section:
                    return section.get('flags').split()
            elif 'Features' in section:
                global_features = section.get('Features').split()
            elif 'flags' in section:
                global_features = section.get('flags').split()
        return global_features

    @memoized
    def list_frequencies(self, cpu):
        """Returns a sorted list of frequencies supported by the cpu or an empty list
        if not could be found."""
        if isinstance(cpu, int):
            cpu = 'cpu{}'.format(cpu)
        try:
            cmd = 'cat /sys/devices/system/cpu/{}/cpufreq/scaling_available_frequencies'.format(cpu)
            output = self.target.execute(cmd)
            available_frequencies = list(map(int, output.strip().split()))  # pylint: disable=E1103
        except TargetStableError:
            # On some devices scaling_frequencies  is not generated.
            # http://adrynalyne-teachtofish.blogspot.co.uk/2011/11/how-to-enable-scalingavailablefrequenci.html
            # Fall back to parsing stats/time_in_state
            path = '/sys/devices/system/cpu/{}/cpufreq/stats/time_in_state'.format(cpu)
            try:
                out_iter = iter(self.target.read_value(path).split())

def directory_exists(self, filepath):
        output = self.execute('if [ -d {} ]; then echo 1; else echo 0; fi'.format(quote(filepath)))
        # output from ssh my contain part of the expression in the buffer,
        # split out everything except the last word.
        return boolean(output.split()[-1])  # pylint: disable=maybe-no-member

def _decode(string):
        value_type = string[:1]
        value_dimension = string[1:2]
        value = unquote(string[2:])
        if value_dimension == 's':
            if value_type == 's':
                return str(value)
            elif value_type == 'b':
                return boolean(value)
            elif value_type == 'd':
                return int(value)
            elif value_type == 'f':
                return float(value)
            elif value_type == 'i':
                return int(value)
            elif value_type == 'n':
                return None
        elif value_dimension == 'l':
            return [ParameterDict._decode(value_type + 's' + x)
                    for x in value.split('0newelement0')]
        else:
            raise ValueError('Unknown {} {}'.format(type(string), string))

def get_data(self, outfile):
        if self.process:
            raise RuntimeError('`get_data` called before `stop`')

        stdout, _ = self.output

        with csvwriter(outfile) as writer:
            active_sites = [c.site for c in self.active_channels]

            # Write column headers
            row = []
            if 'output' in active_sites:
                row.append('output_power')
            if 'USB' in active_sites:
                row.append('USB_power')
            writer.writerow(row)

            # Write data
            for line in stdout.splitlines():
                # Each output line is a main_output, usb_output measurement pair.
                # (If our user only requested one channel we still collect both,
                # and just ignore one of them)
                output, usb = line.split()

# command failed (https://code.google.com/p/android/issues/detail?id=3254).
    # Homogenise this behaviour by running the command then echoing the exit
    # code of the executed command itself.
    command = r'({}); echo "\n$?"'.format(command)

    parts = ['adb']
    if adb_server is not None:
        parts += ['-H', adb_server]
    if device is not None:
        parts += ['-s', device]
    parts += ['shell',
              command if not as_root else su_cmd.format(quote(command))]

    logger.debug(' '.join(quote(part) for part in parts))
    try:
        raw_output, error = check_output(parts, timeout, shell=False)
    except subprocess.CalledProcessError as e:
        raise TargetStableError(str(e))

    if raw_output:
        try:
            output, exit_code, _ = raw_output.replace('\r\n', '\n').replace('\r', '\n').rsplit('\n', 2)
        except ValueError:
            exit_code, _ = raw_output.replace('\r\n', '\n').replace('\r', '\n').rsplit('\n', 1)
            output = ''
    else:  # raw_output is empty
        exit_code = '969696'  # just because
        output = ''

    if check_exit_code:
        exit_code = exit_code.strip()
        re_search = AM_START_ERROR.findall(output)

def get_class_name(name, postfix=''):
    name = identifier(name)
    return ''.join(map(capitalize, name.split('_'))) + postfix