<gh_stars>1-10
import humanize
from cloudmesh.pi.board.monitor import Monitor


class Free(Monitor):

    def __init__(self):
        self.title = "Free"
        self.order = order = [  # noqa: F841
            'host',
            'mem.total', 'mem.used', 'mem.free', 'mem.shared',
            'mem.cache', 'mem.avail',
            'swap.total', 'swap.used', 'swap.free',
        ]  # noqa: F841
        self.command = "free -b"
        self.display = ['mem.used', 'swap.used']
        self.color = {
            'mem.used': 'C0',
            'swap.used': 'C2'}

    def update(self, entry, table=None):
        if not table:
            f = int
        else:
            f = humanize.naturalsize

        header, mem, swap = entry["stdout"].splitlines()
        # noinspection PyPep8
        entry['mem.total'],
        entry['mem.used'],
        entry['mem.free'],
        entry['mem.shared'],
        entry['mem.cache'],
        entry['mem.avail'] = \
            [f(v) for v in mem.split()[1:7]]
        # noinspection PyPep8
        entry['swap.total'], entry['swap.used'], entry['swap.free'] = \
            [f(v) for v in swap.split()[1:4]]
        return entry
