from random import choice
class Randomwalk():
#一個生成隨機(jī)漫步數(shù)據(jù)的類
def __init__(self,num_points=5000):
"""初始化隨機(jī)漫步的屬性"""
self.num_points = num_points
#所有的隨機(jī)數(shù)據(jù)都起始于（0,0)
self.x_values = [0]
self.y_values = [0]
def fill_walk(self):
"""計算隨機(jī)漫步的所有點"""
while len(self.x_values) < self.num_points:
#設(shè)置前進(jìn)的方向和距離
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
#拒絕原地踏步
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
#創(chuàng)建一個實例威酒，并將其所包含的點都繪制出來#
while True:
rw = Randomwalk(10000)
"""增加隨機(jī)漫步的點數(shù)稿黄，改成為10000個"""
rw.fill_walk()
#調(diào)整圖標(biāo)的尺寸以適應(yīng)屏幕
plt.figure(figsize=(10,6))
#給繪制點上色
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)
#著重突出起點和終點
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)
#隱藏坐標(biāo)軸峭沦，突出隨機(jī)漫步的路徑治拿，使用axes函數(shù)
plt.axes().get_xaxis().set_visible(False)
plt.axes().get_yaxis().set_visible(False)
plt.show()
#模擬多次隨機(jī)漫步，使用input加if循環(huán)
keep_running = input('Make another walk?(y/n)')
if keep_running == 'n':
break
