使用plt.show()时报错'ValueError:max()argisanemptysequence'

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()

[]

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 "", line 1, in

    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