开发笔记:Python随机漫步

from random import choice
class RandomWalk():
\'\'\'一个生成随机漫步数据的类\'\'\'
def __init__(self,num_points=5000):
\'\'\'初始化随机漫步的属性\'\'\'
self.num_points = num_points
#所有的随机漫步都始于(0,0)
self.x_values = [0]
self.y_values = [0]
def fill_walk(self):
\'\'\'计算随机漫步的所有点\'\'\'
# 不断漫步，直到列表到达指定长度
while len(self.x_values)<self.num_points:
# 决定前进方向以及沿这个方向前进的距离
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
#拒绝原地踏步
if x_step == 0 and y_step == 0:
continue
#计算下一个点的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)

import matplotlib.pyplot as plt
from matplotlib_test.random_walk import RandomWalk
#创建一个RandomWalk实例，并将其包含的点都绘制出来
rw = RandomWalk()
rw.fill_walk()
print(rw.x_values)
plt.scatter(rw.x_values,rw.y_values,s=15)
plt.show()

import matplotlib.pyplot as plt
from matplotlib_test.random_walk import RandomWalk
#只要程序处理活动状态，就不断的随机模拟
while True:
#创建一个RandomWalk实例，并将其包含的点都绘制出来
rw = RandomWalk()
rw.fill_walk()
plt.scatter(rw.x_values,rw.y_values,s=15)
plt.show()
keep_running = input("Make another walk?(y/n):")
if keep_running == \'n\':
break

plt.figure(dpi=128,figsize=(10,6))