无法加载后端“ Qt5Agg”或不显示任何图

Question

我正在尝试在Jupyter中使用'Qt5Agg'matplotlib后端，但是当我运行%matplotlib qt ，出现以下错误：

ImportError                               Traceback (most recent call last)
<ipython-input-1-f6a92ad1c7f8> in <module>
----> 1 get_ipython().run_line_magic('matplotlib', 'qt')
      2 import numpy as np
      3 from scipy.integrate import odeint
      4 import matplotlib.pyplot as plt
      5 from mpl_toolkits.mplot3d import Axes3D

~/.local/lib/python3.5/site-packages/IPython/core/interactiveshell.py in run_line_magic(self, magic_name, line, _stack_depth)
   2312                 kwargs['local_ns'] = sys._getframe(stack_depth).f_locals
   2313             with self.builtin_trap:
-> 2314                 result = fn(*args, **kwargs)
   2315             return result
   2316 

</home/cs/.local/lib/python3.5/site-packages/decorator.py:decorator-gen-108> in matplotlib(self, line)

~/.local/lib/python3.5/site-packages/IPython/core/magic.py in <lambda>(f, *a, **k)
    185     # but it's overkill for just that one bit of state.
    186     def magic_deco(arg):
--> 187         call = lambda f, *a, **k: f(*a, **k)
    188 
    189         if callable(arg):

~/.local/lib/python3.5/site-packages/IPython/core/magics/pylab.py in matplotlib(self, line)
     97             print("Available matplotlib backends: %s" % backends_list)
     98         else:
---> 99             gui, backend = self.shell.enable_matplotlib(args.gui.lower() if isinstance(args.gui, str) else args.gui)
    100             self._show_matplotlib_backend(args.gui, backend)
    101 

~/.local/lib/python3.5/site-packages/IPython/core/interactiveshell.py in enable_matplotlib(self, gui)
   3412                 gui, backend = pt.find_gui_and_backend(self.pylab_gui_select)
   3413 
-> 3414         pt.activate_matplotlib(backend)
   3415         pt.configure_inline_support(self, backend)
   3416 

~/.local/lib/python3.5/site-packages/IPython/core/pylabtools.py in activate_matplotlib(backend)
    312 
    313     import matplotlib.pyplot
--> 314     matplotlib.pyplot.switch_backend(backend)
    315 
    316     # This must be imported last in the matplotlib series, after

~/.local/lib/python3.5/site-packages/matplotlib/pyplot.py in switch_backend(newbackend)
    220                 "Cannot load backend {!r} which requires the {!r} interactive "
    221                 "framework, as {!r} is currently running".format(
--> 222                     newbackend, required_framework, current_framework))
    223 
    224     rcParams['backend'] = rcParamsDefault['backend'] = newbackend

ImportError: Cannot load backend 'Qt5Agg' which requires the 'qt5' interactive framework, as 'headless' is currently running

我尝试先运行：

import matplotlib
matplotlib.use('Qt5Agg')

但是，如果我再次运行%matplotlib qt ，我将得到相同的错误。 如果我没有运行magic命令，而我却绘制了一些东西，那么它什么也不会显示。