import matplotlib.pyplot as plt
from random import choice


class RandomWalk():

    def __init__(self, num_points = 5000):
        self.num_points = num_points

        # Walk start at zero
        self.x_values = [0]
        self.y_values = [0]

    def fill_walk(self):
        """Calculate all the points in the walk."""

        # Keep taking steps until the walk reaches the desired length.
        while len(self.x_values) < self.num_points:

            # Decide which direction to go and how far to go in that direction.
            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
            next_y = self.y_values[-1] + y_step

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


# Keep making new walks, as long as the program is active.
while True:
    rw = RandomWalk(10000)
    rw.fill_walk()

    # Set the size of the plotting window.
    # plt.figure(dpi=128, figsize=(10, 6))

    point_numbers = list(range(rw.num_points))

    # Plotting points
    plt.scatter(rw.x_values, rw.y_values, c = point_numbers, cmap = plt.cm.Blues, edgecolor = 'none', s=2)

    # Emphasize the first and last points.
    plt.scatter(0, 0, c='green', edgecolors='none', s=100)
    plt.scatter(rw.x_values[-1], rw.y_values[-1], c='red', edgecolors='none',
                s=100)

    # Hiding axis
    plt.axis('off')

    plt.show()

    keep_running = input("Make another walk? (y/n): ")
    if keep_running == 'n':
        break
import matplotlib.pyplot as plt
from random import choice


class RandomWalk():

    def __init__(self, num_points = 5000):
        self.num_points = num_points

        # Walk start at zero
        self.x_values = [0]
        self.y_values = [0]

    def fill_walk(self):
        """Calculate all the points in the walk."""

        # Keep taking steps until the walk reaches the desired length.
        while len(self.x_values) < self.num_points:

            # Decide which direction to go and how far to go in that direction.
            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
            next_y = self.y_values[-1] + y_step

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


# Keep making new walks, as long as the program is active.
while True:
    rw = RandomWalk(10000)
    rw.fill_walk()

    # Set the size of the plotting window.
    # plt.figure(dpi=128, figsize=(10, 6))

    point_numbers = list(range(rw.num_points))

    # Plotting points
    plt.scatter(rw.x_values, rw.y_values, c = point_numbers, cmap = plt.cm.Blues, edgecolor = 'none', s=2)

    # Emphasize the first and last points.
    plt.scatter(0, 0, c='green', edgecolors='none', s=100)
    plt.scatter(rw.x_values[-1], rw.y_values[-1], c='red', edgecolors='none',
                s=100)

    # Hiding axis
    plt.axis('off')

    plt.show()

    keep_running = input("Make another walk? (y/n): ")
    if keep_running == 'n':
        break
# Walk start at zero Calculate all the points in the walk. # Keep taking steps until the walk reaches the desired length. # Decide which direction to go and how far to go in that direction. # Reject moves that go nowhere. # Calculate the next x and y values. # Keep making new walks, as long as the program is active. # Set the size of the plotting window. # plt.figure(dpi=128, figsize=(10, 6)) # Plotting points # Emphasize the first and last points. # Hiding axis