from random import choice class RandomWalk(): "一個(gè)生成隨機(jī)漫步數(shù)據(jù)的表"  def __init__(self, num_points = 5000): """初始化隨機(jī)漫步的屬性""" self.num_points = num_points  # 所有隨機(jī)漫步都起始于(0, 0) self.x_values = [0] self.y_values = [0]  def fill_walk(self): """計(jì)算隨機(jī)漫步包含的所有點(diǎn)"""  # 不斷漫步，直到列表達(dá)到指定的長(zhǎng)度 while len(self.x_values) < self.num_points:   # 決定前進(jìn)的方向以及沿這個(gè)方向前進(jìn)的距離  x_direction = choice([-1, 1])  x_distance = choice([0, 1, 2, 3, 4])  x_step = x_distance * x_direction    y_direction = choice([-1, 1])  y_distance = choice([0, 1, 2, 3, 4])  y_step = y_distance * y_direction   # 拒絕原地踏步  if x_step == 0 and y_step == 0:  continue   # 計(jì)算下一個(gè)點(diǎn)的x和y值  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)

from random_walk import RandomWalk # 不斷的模擬隨機(jī)漫步while True: # 創(chuàng)建一個(gè)RandomWalk實(shí)例，將其包含的點(diǎn)繪制出來 rw = RandomWalk() rw.fill_walk()   point_numbers = list(range(rw.num_points)) plt.scatter(rw.x_values, rw.y_values, c = point_numbers, cmap = plt.cm.Blues,  edgecolor = 'none', s = 5)  # 突出起點(diǎn)和終點(diǎn) 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)  # 隱藏坐標(biāo)軸 # plt.axes().get_xaxis().set_visible(False) # plt.axes().get_yaxis().set_visible(False)  plt.show()  keep_running = input("Make another walk? (y/n): ") if keep_running.lower().startswith('n'): break