random_walk.py

from random import choice

class RandomWalk():
    """A class to generate random walks."""

    def __init__(self, num_points=5000):
        self.num_points = num_points
        self.x_values=[0]
        self.y_values=[0]
    def fill_walk(self):
        while len(self.x_values) < self.num_points:
            x_direction = choice([1,-1])
            x_distance = choice([0,1,2,3,4])
            x_step=x_direction * x_distance
            
            y_direction=choice([1, -1])
            y_distance = choice([0,1,2,3,4])
            y_step = y_direction * y_distance

            #Reject moves that go nowhere
            if x_step == 0 and y_step == 0:
                continue

            #Calculate the next x and y values.
            next_x = self.x_values[-1] + x_step # -1 referes to last value stored, far right side of list
            next_y = self.y_values[-1] + y_step

            self.x_values.append(next_x)
            self.y_values.append(next_y)