誤將逗號寫成了點號,. 導致漫步呈現出直線跑,查了半個多小時,最後源碼分段替換,最終查到,簡直艱難。記錄之
y_direction = choice([1.-1])
y_direction = choice([1, -1])
random_walk.py
from random import choice
class RandomWalk():
"""一個生成隨機漫步數據的類"""
def __init__(self,num_points=5000):
"""初始化隨機漫步的屬性"""
self.num_points = num_points
#所有隨機漫步都始於(0,0)
self.x_values = [0]
self.y_values = [0]
def fill_walk(self):
"""計算隨機漫步包含的所有點"""
#不斷漫步,知道列表達到指定的長度
while len(self.x_values) < self.num_points:
#決定前進方向以及沿這個方向以及沿這個方向前進的距離
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
#計算下一個點的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)
rw_visual.py
import matplotlib.pyplot as plt
from random_walk import RandomWalk
#創建一個RandomWalk實例,並將其包含的點都繪製出來
rw = RandomWalk()
rw.fill_walk()
plt.scatter(rw.x_values,rw.y_values,s=15)
plt.show()