Untitled

 run.sh (set this as a cron job)

#!/bin/bash

cd /change/this/speedtest-results
FILE=`date +%F_%T`
/usr/local/bin/speedtest-cli --simple > $FILE

 Python script
#!/usr/bin/python

import os
results = []

for name in os.listdir('/change/this/speedtest-results/'):
    if '-' in name:
        f = open('/change/this/speedtest-results/'+name, 'r')
        data = f.read()
        f.close()
        if 'Ping' not in data:
            continue
        lines = data.splitlines()
        upload = lines[1].split()[1]
        download = lines[2].split()[1]
        results.append((name, upload, download))

for result in sorted(results):
    print ",".join(result)