IncreaseAccuracy.py

# meant to be run as a cronjob
# used to aggreagate data output from hoowmanypeople around and send to server

from datetime import datetime
import requests

def main(start,end):
    now = datetime.now()
    list_of_list_of_macs = []


    # -- Scanning file --
    with open(FILENAME, 'r') as f:
        lines = f.readlines()
        list_of_dicts = []
        timeList = []
        avg = 0.0
        try:
            for i in range(start, end, -1):
                list_of_dicts.append(lines[i])
        except:
            ()  # Trying to read 10 lines of a 5 line file will cause this

        for d in range(len(list_of_dicts)):
            d = eval(list_of_dicts[d])
            tempList = []
            avg += len(d['cellphones'])
            timeList.append(d['time'])

            for num in d['cellphones']:
                tempList.append(num['mac'])
            list_of_list_of_macs.append(tempList)
    # -- end of file scanning --

    # -- iterating through list of list of macs to find unique values --
    total = set()  # Set of unqiue macs found in lists
    for i in range(len(list_of_list_of_macs)):
        for j in list_of_list_of_macs[i]:
            if (i > 0):
                if (j in list_of_list_of_macs[i - 1]):
                    total.add(j)
    # -- fin --


    report = {}
    if (len(list_of_dicts) == 0):
        report["value1"] = ('No elements')
        requests.post("https://maker.ifttt.com/trigger/Howmanypeople/with/key/*************", data=report)
    else:
        avg = float('%.2f' % (avg / len(list_of_dicts)))  # math to find average to two decimal places
        print('Amount of unique Macs', len(total))
        print('Average', avg)

        report["value1"] = datetime.fromtimestamp(timeList[-1]), '-', datetime.fromtimestamp(timeList[0])
        report["value2"] = ('Amount of unique Macs', len(total))
        report["value3"] = ('Average', avg)
        requests.post("https://maker.ifttt.com/trigger/Howmanypeople/with/key/*************", data=report)


def reset_file(filename):
    seconds_since_midnight = (now - now.replace(hour=0, minute=0, second=0, microsecond=0)).total_seconds()
    if (seconds_since_midnight < 120):
        open(filename, 'w').close() #clear contents for privacy reasons at midnight. Also it helps keeps the file size manageable.

if __name__ == '__main__':
    FILENAME = "log.json"  # File to read

    start = -1  # what line to start at
    end = -7  # what line to end at
    # difference between start and end is how many json lines to read. Can smooth out average. 
    main()
    reset_file(filename)