python实现随机漫步算法

from random import choice

class randomwalk():

  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([0,1,2,3,4,5])
      x_step=x_direction*x_distance
      y_direction=choice([1,-1])
      y_distance=choice([0,1,2,3,4,5])
      y_step=y_direction*y_distance

      if x_step==0 and y_step==0:
        continue

      self.x_values.append(self.x_values[-1]+x_step)
      self.y_values.append(self.y_values[-1]+y_step)

import matplotlib.pyplot as plt
from random_walk import randomwalk


while True:
  rw=randomwalk()
  rw.fill_walk()
  plt.figure(figsize=(15,8))
  point_numbers=list(range(rw.num_points))

  plt.scatter(rw.x_values,rw.y_values,s=1,c=point_numbers,
  edgecolor='none',cmap=plt.cm.Blues)

  plt.scatter(rw.x_values[0],rw.y_values[0],s=50,edgecolor='none',
  c='green')

  plt.scatter(rw.x_values[-1],rw.y_values[-1],s=50,edgecolor='none',
  c='green')

  plt.show()

  a=input("do you want to walk again?(y/n)")
  if a=='n':
    break