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random_walk.py
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random_walk.py
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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):
"""计算随机漫步包含的所有点"""
# 不断漫步,直到列表达到指定的长度
while len(self.x_values) < self.num_points:
x_step = self.get_step()
y_step = self.get_step()
# 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
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)
def get_step(self):
# 决定前进的方向以及沿这个方向前进的距离
direction = choice([1, -1])
distance = choice([0, 1, 2, 4, 8, 16, 32])
step = direction * distance
return step