随机漫步完整代码

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
        #所有的随机数据都起始于(0,0)
        self.x_values = [0]
        self.y_values = [0]
    def fill_walk(self):
        """计算随机漫步的所有点"""
        while len(self.x_values) < self.num_points:
            #设置前进的方向和距离
            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
            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 matplotlib import pyplot as plt
from randomwalk import Randomwalk
#创建一个实例,并将其所包含的点都绘制出来#
while True:
    rw = Randomwalk(10000)
    """增加随机漫步的点数,改成为10000个"""
    rw.fill_walk()
    #调整图标的尺寸以适应屏幕
    plt.figure(figsize=(10,6))
    #给绘制点上色
    points_numbers = list(range(rw.num_points))
    plt.scatter(rw.x_values,rw.y_values,c=points_numbers,cmap=plt.cm.Blues,edgecolor='none',s=1)
    #着重突出起点和终点
    plt.scatter(0,0,c='red',edgecolor='none',s=100)
    plt.scatter(rw.x_values[-1],rw.y_values[-1],c='green',edgecolor='none',s=100)
    #隐藏坐标轴,突出随机漫步的路径,使用axes函数
    plt.axes().get_xaxis().set_visible(False)
    plt.axes().get_yaxis().set_visible(False)
    plt.show()
    #模拟多次随机漫步,使用input加if循环
    keep_running = input('Make another walk?(y/n)')
    if keep_running == 'n':
        break

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