我有一个EC2实例，其中包含所有需要安装和升级的东西。
尝试创建绘图时，我总是收到警告和错误。
警告是：
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.
此后立即出现的错误：
Traceback (most recent call last):
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/home/ec2-user/mnn/nn_tp_thread.py", line 241, in run
plt.plot(mean_prediction_last_10)
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/pyplot.py", line 3347, in plot
ax = gca()
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/pyplot.py", line 984, in gca
return gcf().gca(**kwargs)
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/figure.py", line 1817, in gca
return self.add_subplot(1, 1, 1, **kwargs)
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/figure.py", line 1240, in add_subplot
self._axstack.add(key, a)
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/figure.py", line 142, in add
Stack.remove(self, (key, a_existing))
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/cbook/__init__.py", line 1254, in remove
raise ValueError('Unknown element o')
ValueError: Unknown element o
我的代码是：
thread_locker.acquire()
mean_prediction_last_10 = mean_prediction[9:]
mean_prediction_last_10
plt.plot(mean_prediction_last_10)
plt.title('Price Prediction - ' + str(datetime.datetime.now().time()))
plt.xlabel('Time')
plt.ylabel('Mean Price')
plt.legend()
# plt.show()
fig = plt.figure()
fig.savefig("/static/images/Last_prediction_"+ timeframe +".png")
thread_locker.release()
我已经搜索并尝试了许多方法，但是没有成功。有什么建议么？
编辑：
更改代码以清除任何图形和图解（尽管不应该存在）：
thread_locker.acquire()
plt.clf()
plt.close()
mean_prediction_last_10 = mean_prediction[9:]
plt.plot(mean_prediction_last_10)
fig = plt.figure()
plt.title('Price Prediction - ' + str(datetime.datetime.now().time()))
plt.xlabel('Time')
plt.ylabel('Mean Price')
plt.legend()
# plt.show()
fig.savefig("/static/images/Last_prediction_"+ timeframe +".png")
thread_locker.release()
我收到如下消息：
No handles with labels found to put in legend.
和另一个错误：
Traceback (most recent call last):
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "/home/ec2-user/mnn/nn_tp_thread.py", line 237, in run
plt.clf()
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/pyplot.py", line 686, in clf
gcf().clf()
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/figure.py", line 1413, in clf
self.delaxes(ax) # removes ax from self._axstack
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/figure.py", line 1007, in delaxes
self._axstack.remove(ax)
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/figure.py", line 113, in remove
Stack.remove(self, self._entry_from_axes(a))
File "/home/ec2-user/anaconda3/envs/tensorflow_p36/lib/python3.6/site-packages/matplotlib/figure.py", line 108, in _entry_from_axes
ind, k = {a: (ind, k) for k, (ind, a) in self._elements}[e]
KeyError: <matplotlib.axes._subplots.AxesSubplot object at 0x7f165b4e10b8>
最佳答案
当我尝试使用matplotlib获取频谱图数据时，我也遇到了一个错误“未知元素o”：
pxx, freqs, bins, im = plt.specgram(sample, NFFT=256, Fs=10000, noverlap=120)
我在训练模型时使用了这条线，所以不需要绘图，而是通过关闭窗口并移除轴来解决它：
pxx, freqs, bins, im = plt.specgram(sample, NFFT=256, Fs=10000, noverlap=120)
plt.axis('off')
plt.close()
我希望有人能对此有所帮助。
关于python - 在EC2实例中调用图时，“未知元素o”，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/50119460/