【发布时间】：2018-09-01 03:29:54
【问题描述】：
我制作了一个程序，它会随机游走并绘制它。它运行良好，但每次运行程序时都会收到警告。它说：
MatplotlibDeprecationWarning:
Adding an axes using the same arguments as a previous axes currently reuses the earlier instance.
In a future version, a new instance will always be created and returned. Meanwhile, this warning can be suppressed,
and the future behavior ensured, by passing a unique label to each axes instance.
警告警告我，当我尝试删除 rw_visual.py 中的 x 和 y 轴时
我的random_walk.py（如果需要测试的话）：
from random import choice
class RandomWalk():
"""A class to generate random walks."""
def __init__(self, num_points=5000):
"""Initialize attributes of a walk."""
self.num_points = num_points
# All walks start at (0, 0).
self.x_values = [0]
self.y_values = [0]
def fill_walk(self):
"""Calculate all the points in the walk."""
# Keep taking steps until the walk reaches the desired length.
while len(self.x_values) < self.num_points:
# Decide which direction to go and how far to go in that direction.
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
# Reject moves that go nowhere.
if x_step == 0 and y_step == 0:
continue
# Calculate the next x and y values.
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)
我的rw_visual.py（出现警告的地方）：
import matplotlib.pyplot as plt
from random_walk import RandomWalk
# Keep making new walks, as long as the program is active.
while True:
# Make random walk, and plot the points.
rw = RandomWalk()
rw.fill_walk()
point_numbers = list(range(rw.num_points))
plt.scatter(rw.x_values, rw.y_values, c=point_numbers, cmap=plt.cm.Blues,
edgecolor='none', s=10)
# Emphasize the first and last points.
plt.scatter(0, 0, c='green', edgecolors='none', s=150)
plt.scatter(rw.x_values[-1], rw.y_values[-1], c='red', edgecolors='none',
s=150)
# Remove the axes.
plt.axes().get_xaxis().set_visible(False) # This is what it warns me about, I think.
plt.axes().get_yaxis().set_visible(False) # It also warns me about this.
plt.show()
keep_running = input("Make another walk? (y/n): ")
if keep_running == 'n':
break
感谢任何帮助。谢谢！
【问题讨论】：
标签： python matplotlib deprecation-warning