使用plt.show()时报错 'ValueError: max() arg is an empty sequence'

Question

在Pycharm下使用matploylib库绘制3D图的时候，在最后需要显示图像的时候，每当输入plt.show() 都会报错

ValueError: max() arg is an empty sequence

但是同样的代码在IDLE里面运行就没有问题。
请问是怎么回事儿呢？应该怎么处理才好，非常感谢

import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D


x = np.linspace(-6 * np.pi, 6 * np.pi, 1000)
y = np.sin(x)
z = np.cos(x)


fig = plt.figure()
ax = Axes3D(fig)


ax.plot(x, y, z)


plt.show()

我试着在 Python Console 里一行一行的运行，都是在最后plt.show()的时候才会报错

[<mpl_toolkits.mplot3d.art3d.Line3D at 0x111b09c88>]
plt.show()
/Users/harry./Library/Python/3.6/lib/python/site-packages/matplotlib/figure.py:1743: UserWarning: This figure includes Axes that are not compatible with tight_layout, so its results might be incorrect.
  warnings.warn("This figure includes Axes that are not "
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/IPython/core/interactiveshell.py", line 3267, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)
  File "<ipython-input-6-1eb00ff78cf2>", line 1, in <module>
    plt.show()
  File "/Users/harry./Library/Python/3.6/lib/python/site-packages/matplotlib/pyplot.py", line 253, in show
    return _show(*args, **kw)
  File "/Applications/PyCharm.app/Contents/helpers/pycharm_matplotlib_backend/backend_interagg.py", line 27, in __call__
    manager.show(**kwargs)
  File "/Applications/PyCharm.app/Contents/helpers/pycharm_matplotlib_backend/backend_interagg.py", line 99, in show
    self.canvas.show()
  File "/Applications/PyCharm.app/Contents/helpers/pycharm_matplotlib_backend/backend_interagg.py", line 64, in show
    self.figure.tight_layout()
  File "/Users/harry./Library/Python/3.6/lib/python/site-packages/matplotlib/figure.py", line 1753, in tight_layout
    rect=rect)
  File "/Users/harry./Library/Python/3.6/lib/python/site-packages/matplotlib/tight_layout.py", line 326, in get_tight_layout_figure
    max_nrows = max(nrows_list)
ValueError: max() arg is an empty sequence

Answer 1

个人的理解是，IDLE可以展现图片，但是python console（类似与命令行）没有办法展示图片，所以就报错了。
解决方案可以把你要看的文件，以pic.png的形式保存到本地，就不会报错了。

最后一步改成如下：

plt.savefig('pic.png',bbox_inches='tight')