aliens.py

from sys import argv
import random

city_map = {}

class City(object):
    def __init__(self, name, aliens, neighbors={}):
        self.name = name
        # aliens in the city will be stored in an array
        self.aliens = []
        city_map[self.name] = self
        self.neighbors = neighbors 

    def update(self):
        if len(self.aliens) >= 2:
            self.destroy()

    def destroy(self):
       # when a city is destroyed, it is removed
       # from the city map

       del(city_map[self.name]) 

    def __str__(self):
        return self.name
    
    def move_aliens(self):
        for alien in self.move_aliens:
            alien.move()

    def update(self):
        if len(self.aliens) >= 2:
            self.destroy
            self.move_aliens

class Alien(object):
    alien_number = 1
    def __init__(self, name):
        self.name = name + str(Alien.alien_number)
        Alien.alien_number += 1
        self.move_count = 0
        self.move()

    def move(self):
        self.move_count += 1
        city_name = random.choice(city_map.keys())
        city_map[city_name].aliens.append(self)
    def __str__(self):
        return self.name

def create_aliens(n):
    alien_name = 'alien '
    aliens = []
    for i in range(1, n+1):
       new_alien = Alien(alien_name)

    return aliens

with open('world_map_medium.txt', 'r') as f:
    for line in f.readlines():
        data = line.split()
        city_name = data[0]
        neighbors = {}
        for direction_neighbor in data[1:]:
            direction, neighbor = direction_neighbor.split('=')
            neighbors[direction] = neighbor 
        city_map[city_name] = City(city_name, neighbors)
    create_aliens(8000)