checkinetspeed.py

#!/usr/bin/env python3

from subprocess import check_output
from json import loads
from time import sleep
from datetime import datetime

class Stats:
    def __init__(self):
        self.min = float('inf')
        self.max = float('-inf')
        self.sum = 0
        self.cnt = 0

    def append(self, value):
        self.min = min(self.min, value)
        self.max = max(self.max, value)
        self.sum += value
        self.cnt += 1

    @property
    def avg(self):
        return self.sum / self.cnt

    def __str__(self):
        p = lambda v: round(v * 1e-6)

        return '{:>2} {:>2} {:>2}'.format(p(self.avg), p(self.min), p(self.max))

def display(download, upload):
    timestamp = datetime.strftime(datetime.now(), '%H:%M:%S')
    print('{} Download  {}\n         Upload    {}'.format(timestamp, download, upload))

print('time     direction avg  min  max  (Mbit/s)')

try:
    download = Stats()
    upload = Stats()

    while True:
        raw = check_output(['speedtest', '--json'])
        result = loads(raw)

        download.append(result['download'])
        upload.append(result['upload'])

        display(download, upload)

        sleep(100)
except KeyboardInterrupt:
    pass