OSRS_World_Pop_Tracker

import urllib.request
import time
import string

worldDict = {}


class Del:  # needed to remove trash from pop_num later on
            # http://stackoverflow.com/questions/1450897/python-removing-characters-except-digits-from-string
    def __init__(self, keep=string.digits):
        self.comp = dict((ord(c), c) for c in keep)

    def __getitem__(self, k):
        return self.comp.get(k)


DD = Del()


def main():

    my_str = get_html()

    goto_worlds = my_str.find("<tbody class='server-list__body'>")

    go_through_worlds(goto_worlds)

    iteration = 0

    try:
        while True:  # main loop

            get_pops(goto_worlds)

            add_pops(iteration)

            time.sleep(60)

            iteration += 1

    except KeyboardInterrupt:
        pass


def go_through_worlds(last_position):  # gets world numbers from the html sheet, makes them keys in worldDict

    my_str = get_html()

    while my_str.find("world=", last_position) != -1:
        pos = my_str.find("world=", last_position)
        world_num = int(my_str[pos + 6:pos + 9])
        worldDict[world_num] = []
        last_position = pos + 10

    return worldDict


def get_pops(last_position):  # gets population numbers from the html sheet, makes them values in the list of worldDict

    my_str = get_html()

    while my_str.find("world=", last_position) != -1:

        for keys in sorted(worldDict.keys()):

            pos = my_str.find("world=" + str(keys), last_position)
            pop_num = my_str[pos + 140:pos + 145]

            pop_num = pop_num.translate(DD)

            try:

                pop_num = int(pop_num)

            except ValueError:

                pop_num = "down"

            worldDict[keys].append(pop_num)

            last_position = pos + 8

    return worldDict


def get_html():  # gets the html sheet from the url given, converts it to a string
    my_url = urllib.request.urlopen("http://oldschool.runescape.com/slu?order=WmpLA")
    my_bytes = my_url.read()

    my_str = my_bytes.decode("utf8")
    my_url.close()

    return my_str


def add_pops(i):  # subtracts last known pop from current pop, then prints this for every world to show changes

    j = 0

    if i == 0:
        for keys in sorted(worldDict.keys()):
            if j < 4:
                if worldDict[keys][i] == 'down':
                    print(str(keys) + " :  n/a", end=" || ")
                    j += 1
                else:
                    print(str(keys) + " : " + str("{:4d}".format(worldDict[keys][i])), end=" || ")
                    j += 1
            else:
                if worldDict[keys][i] == 'down':
                    print(str(keys) + " :  n/a", end="\n")
                    j = 0
                else:
                    print(str(keys) + " : " + str("{:4d}".format(worldDict[keys][i])), end="\n")
                    j = 0

    else:
        for keys in sorted(worldDict.keys()):
            if j < 4:
                if worldDict[keys][i] == 'down':
                    print(str(keys) + " : n/a", end=" || ")
                    j += 1
                else:
                    curr_change = worldDict[keys][i] - worldDict[keys][i - 1]
                    print(str(keys) + " : " + str('{:+3d}'.format(curr_change)), end=" || ")
                    j += 1
            else:
                if worldDict[keys][i] == 'down':
                    print(str(keys) + " : n/a", end="\n")
                    j = 0
                else:
                    curr_change = worldDict[keys][i] - worldDict[keys][i - 1]
                    print(str(keys) + " : " + str('{:+3d}'.format(curr_change)), end="\n")
                    j = 0

main()